Look-alike pairs

1936 pairs of reptiles and amphibians that people mix up, each with a sheet marking what tells them apart.

• African Five-lined Skink vs. Gilbert's Skink
• African Five-lined Skink vs. Little Brown Skink
• African Five-lined Skink vs. Orange-throated Whiptail
• African Five-lined Skink vs. Six-lined Racerunner
• African Five-lined Skink vs. Western Skink
• Alabama Map Turtle vs. Northern Map Turtle
• Alabama Red-bellied Cooter vs. Pond Slider
• Alabama Red-bellied Cooter vs. River Cooter
• Alabama Waterdog vs. Gulf Coast Waterdog
• Allegheny Mountain Dusky Salamander vs. Eastern Red-backed Salamander
• Allegheny Mountain Dusky Salamander vs. Four-toed Salamander
• Allegheny Mountain Dusky Salamander vs. Northern Dusky Salamander
• Allegheny Mountain Dusky Salamander vs. Northern Ravine Salamander
• Allegheny Mountain Dusky Salamander vs. Northern Slimy Salamander
• Allegheny Mountain Dusky Salamander vs. Northern Two-lined Salamander
• Allegheny Mountain Dusky Salamander vs. Southern Two-lined Salamander
• Alligator Snapping Turtle vs. Common Snapping Turtle
• Allison's Anole vs. Brown Anole
• Allison's Anole vs. Green Anole
• Amargosa Toad vs. Western Toad
• American Bullfrog vs. Green Frog
• American Crocodile vs. American Alligator
• American Toad vs. Fowler's Toad
• Amur Softshell Turtle vs. Chinese Softshell Turtle
• Apalachicola Dusky Salamander vs. Spotted Dusky Salamander
• Apalachicola Waterdog vs. Greater Siren
• Apalachicola Waterdog vs. Lesser Siren
• Apalachicola Waterdog vs. One-toed Amphiuma
• Apalachicola Waterdog vs. Two-toed Amphiuma
• Aquatic Garter Snake vs. Common Garter Snake
• Aquatic Garter Snake vs. Northwestern Garter Snake
• Aquatic Garter Snake vs. Two-striped Garter Snake
• Aquatic Garter Snake vs. Western Terrestrial Garter Snake
• Arboreal Salamander vs. Clouded Salamander
• Arboreal Salamander vs. Ensatina
• Arboreal Salamander vs. Klamath Black Salamander
• Arguello Slender Salamander vs. Black-bellied Slender Salamander
• Arguello Slender Salamander vs. Channel Islands Slender Salamander
• Arizona Black Rattlesnake vs. Desert Nightsnake
• Arizona Black Rattlesnake vs. Gopher Snake
• Arizona Black Rattlesnake vs. Mojave Rattlesnake
• Arizona Black Rattlesnake vs. Prairie Rattlesnake
• Arizona Black Rattlesnake vs. Sidewinder
• Arizona Black Rattlesnake vs. Sonoran Lyre Snake
• Arizona Black Rattlesnake vs. Southwestern Speckled Rattlesnake
• Arizona Black Rattlesnake vs. Western Diamond-backed Rattlesnake
• Arizona Mountain Kingsnake vs. Ground Snake
• Arizona Mountain Kingsnake vs. Long-nosed Snake
• Arizona Mountain Kingsnake vs. Sonoran Coralsnake
• Arizona Mountain Kingsnake vs. Western Milksnake
• Arizona Mud Turtle vs. Sonoran Mud Turtle
• Arizona Mud Turtle vs. Yellow Mud Turtle
• Arizona Night Lizard vs. Desert Night Lizard
• Arizona Striped Whiptail vs. Desert Grassland Whiptail
• Arizona Striped Whiptail vs. Plateau Striped Whiptail
• Arizona Striped Whiptail vs. Sonoran Spotted Whiptail
• Arizona Toad vs. Great Plains Toad
• Arizona Toad vs. Red-spotted Toad
• Arizona Toad vs. Woodhouse's Toad
• Arizona Tree Frog vs. Canyon Tree Frog
• Arroyo Toad vs. Red-spotted Toad
• Arroyo Toad vs. Western Spadefoot
• Arroyo Toad vs. Western Toad
• Arroyo Toad vs. Woodhouse's Toad
• Ashy Gecko vs. Mediterranean Gecko
• Asian House Gecko vs. Mourning Gecko
• Atlantic Coast Leopard Frog vs. Northern Leopard Frog
• Atlantic Coast Leopard Frog vs. Southern Leopard Frog
• Atlantic Coast Slimy Salamander vs. White-spotted Slimy Salamander
• Azure-tailed Skink vs. Dark-flecked Garden Sunskink
• Azure-tailed Skink vs. Moth Skink
• Azure-tailed Skink vs. Mottled Snake-eyed Skink
• Baird's Ratsnake vs. Great Plains Ratsnake
• Baird's Ratsnake vs. Trans-Pecos Ratsnake
• Baird's Ratsnake vs. Western Ratsnake
• Baja California Coachwhip vs. Common Coachwhip
• Baja California Coachwhip vs. North American Racer
• Baja California Collared Lizard vs. Banded Rock Lizard
• Baja California Collared Lizard vs. Desert Collared Lizard
• Baja California Collared Lizard vs. Long-nosed Leopard Lizard
• Baja California Night Lizard vs. Desert Night Lizard
• Baja California Night Lizard vs. Granite Night Lizard
• Baja California Night Lizard vs. Peninsular Leaf-toed Gecko
• Baja California Night Lizard vs. Sandstone Night Lizard
• Baja California Night Lizard vs. Western Banded Gecko
• Bakersfield Legless Lizard vs. Northern Legless Lizard
• Bakersfield Legless Lizard vs. San Diegan Legless Lizard
• Banded Rock Lizard vs. Desert Collared Lizard
• Banded Rock Lizard vs. Desert Spiny Lizard
• Banded Rock Lizard vs. Granite Spiny Lizard
• Banded Sand Snake vs. Colorado Desert Shovelnose Snake
• Banded Sand Snake vs. Ground Snake
• Banded Sand Snake vs. Sonoran Coralsnake
• Banded Watersnake vs. Common Watersnake
• Banded Watersnake vs. Diamondback Watersnake
• Banded Watersnake vs. Eastern Copperhead
• Banded Watersnake vs. Mississippi Green Watersnake
• Banded Watersnake vs. Northern Cottonmouth
• Banded Watersnake vs. Plain-bellied Watersnake
• Barefoot Banded Gecko vs. Baja California Night Lizard
• Barefoot Banded Gecko vs. Desert Night Lizard
• Barefoot Banded Gecko vs. Granite Night Lizard
• Barefoot Banded Gecko vs. Peninsular Leaf-toed Gecko
• Barefoot Banded Gecko vs. Western Banded Gecko
• Bark Anole vs. Brown Anole
• Bark Anole vs. Crested Anole
• Barking Treefrog vs. Cope's Gray Tree Frog
• Barking Treefrog vs. Green Treefrog
• Barking Treefrog vs. Pine Woods Treefrog
• Barking Treefrog vs. Squirrel Treefrog
• Barton Springs Salamander vs. Austin Blind Salamander
• Barton Springs Salamander vs. Jollyville Plateau Salamander
• Berry Cave Salamander vs. Spring Salamander
• Bezy's Night Lizard vs. Arizona Night Lizard
• Bezy's Night Lizard vs. Desert Night Lizard
• Big Bend Blackhead Snake vs. Plains Black-headed Snake
• Big Bend Blackhead Snake vs. Southwestern Blackhead Snake
• Big Bend Patch-nosed Snake vs. Black-necked Garter Snake
• Big Bend Patch-nosed Snake vs. Checkered Garter Snake
• Big Bend Patch-nosed Snake vs. Mountain Patch-nosed Snake
• Big Bend Patch-nosed Snake vs. Sonoran Whipsnake
• Big Bend Patch-nosed Snake vs. Striped Whipsnake
• Big Bend Slider vs. False Map Turtle
• Big Bend Slider vs. Painted Turtle
• Big Bend Slider vs. Pond Slider
• Big Bend Slider vs. Rio Grande Cooter
• Big Levels Salamander vs. Eastern Red-backed Salamander
• Big Spring Legless Lizard vs. Bakersfield Legless Lizard
• Big Spring Legless Lizard vs. Northern Legless Lizard
• Big Spring Legless Lizard vs. San Diegan Legless Lizard
• Bird-voiced Treefrog vs. Cope's Gray Tree Frog
• Bird-voiced Treefrog vs. Gray Treefrog
• Black Kingsnake vs. Central Ratsnake
• Black Mountain Salamander vs. Allegheny Mountain Dusky Salamander
• Black Mountain Salamander vs. Northern Dusky Salamander
• Black Mountain Salamander vs. Seal Salamander
• Black Spiny-tailed Iguana vs. Green Iguana
• Black Swampsnake vs. Glossy Swampsnake
• Black Swampsnake vs. Mudsnake
• Black Swampsnake vs. Plain-bellied Watersnake
• Black Swampsnake vs. Red-bellied Snake
• Black Toad vs. Western Toad
• Black Toad vs. Yosemite Toad
• Black-bellied Slender Salamander vs. Southern California Slender Salamander
• Black-knobbed Map Turtle vs. Alabama Map Turtle
• Black-necked Garter Snake vs. Checkered Garter Snake
• Black-necked Garter Snake vs. Western Terrestrial Garter Snake
• Black-spotted Newt vs. Eastern Newt
• Black-striped Snake vs. DeKay's Brownsnake
• Black-tailed Brush Lizard vs. Common Side-blotched Lizard
• Black-tailed Brush Lizard vs. Long-tailed Brush Lizard
• Black-tailed Brush Lizard vs. Ornate Tree Lizard
• Black-tailed Brush Lizard vs. Southern Sagebrush Lizard
• Black-tailed Brush Lizard vs. Western Fence Lizard
• Blacksburg Salamander vs. Northern Slimy Salamander
• Blacksburg Salamander vs. White-spotted Slimy Salamander
• Blainville's Horned Lizard vs. Desert Horned Lizard
• Blanding's Turtle vs. Ouachita Map Turtle
• Blanding's Turtle vs. Spotted Turtle
• Blue Ridge Blackbelly Salamander vs. Central Shovel-nosed Dusky Salamander
• Blue Ridge Blackbelly Salamander vs. Northern Dusky Salamander
• Blue Ridge Blackbelly Salamander vs. Northern Shovel-nosed Salamander
• Blue Ridge Blackbelly Salamander vs. Seal Salamander
• Blue Ridge Dusky Salamander vs. Northern Dusky Salamander
• Blue Ridge Dusky Salamander vs. Northern Pygmy Salamander
• Blue Ridge Dusky Salamander vs. Seal Salamander
• Blue Ridge Gray-cheeked Salamander vs. White-spotted Slimy Salamander
• Blue Ridge Two-lined Salamander vs. Junaluska Salamander
• Blue Ridge Two-lined Salamander vs. Long-tailed Salamander
• Blue Ridge Two-lined Salamander vs. Southern Two-lined Salamander
• Blue Spiny Lizard vs. Crevice Spiny Lizard
• Blue-spotted Salamander vs. Mole Salamander
• Blue-spotted Salamander vs. Northern Slimy Salamander
• Blue-spotted Salamander vs. Small-mouthed Salamander
• Blunt-nosed Leopard Lizard vs. Long-nosed Leopard Lizard
• Boa Constrictor vs. Burmese Python
• Bog Dwarf Salamander vs. Coastal Plain Dwarf Salamander
• Bog Dwarf Salamander vs. Southern Two-lined Salamander
• Bog Turtle vs. Spotted Turtle
• Bog Turtle vs. Wood Turtle
• Bolson Tortoise vs. Sonoran Desert Tortoise
• Boreal Chorus Frog vs. Western Chorus Frog
• Brazos River Watersnake vs. Diamondback Watersnake
• Brazos River Watersnake vs. Plain-bellied Watersnake
• Brimley's Chorus Frog vs. Little Grass Frog
• Brimley's Chorus Frog vs. Upland Chorus Frog
• Broad-banded Copperhead vs. Banded Watersnake
• Broad-banded Copperhead vs. Common Watersnake
• Broad-banded Copperhead vs. Diamondback Watersnake
• Broad-banded Copperhead vs. Eastern Copperhead
• Broad-banded Copperhead vs. Northern Cottonmouth
• Broad-banded Copperhead vs. Plain-bellied Watersnake
• Brown Basilisk vs. Brown Anole
• Brown Basilisk vs. Northern Curly-tailed Lizard
• Brown Watersnake vs. Banded Watersnake
• Brown Watersnake vs. Common Watersnake
• Brown Watersnake vs. Eastern Copperhead
• Brown Watersnake vs. Northern Cottonmouth
• Brown Watersnake vs. Plain-bellied Watersnake
• Brownback Salamander vs. Southern Two-lined Salamander
• Butler's Garter Snake vs. Common Garter Snake
• Butler's Garter Snake vs. Common Ribbon Snake
• Caddo Mountain Salamander vs. Fourche Mountain Salamander
• Caddo Mountain Salamander vs. Southern Red-backed Salamander
• Caddo Mountain Salamander vs. Western Slimy Salamander
• Cagle's Map Turtle vs. Pond Slider
• Cagle's Map Turtle vs. Texas Cooter
• Cajun Chorus Frog vs. Spotted Chorus Frog
• Cajun Chorus Frog vs. Spring Peeper
• Cajun Chorus Frog vs. Strecker's Chorus Frog
• California Giant Salamander vs. Northwestern Salamander
• California Giant Salamander vs. Pacific Giant Salamander
• California Kingsnake vs. California Mountain Kingsnake
• California Kingsnake vs. Ground Snake
• California Lyresnake vs. Coast Night Snake
• California Lyresnake vs. Desert Nightsnake
• California Lyresnake vs. Panamint Rattlesnake
• California Lyresnake vs. Red Diamond Rattlesnake
• California Lyresnake vs. Southwestern Speckled Rattlesnake
• California Lyresnake vs. Western Glossy Snake
• California Lyresnake vs. Western Leaf-nosed Snake
• California Lyresnake vs. Western Rattlesnake
• California Mountain Kingsnake vs. Ground Snake
• California Newt vs. Rough-skinned Newt
• California Newt vs. Sierra Newt
• California Red-legged Frog vs. American Bullfrog
• California Red-legged Frog vs. Cascades Frog
• California Red-legged Frog vs. Foothill Yellow-legged Frog
• California Red-legged Frog vs. Northern Red-legged Frog
• California Slender Salamander vs. Dunn's Salamander
• California Slender Salamander vs. Western Red-backed Salamander
• California Tiger Salamander vs. Long-toed Salamander
• California Tiger Salamander vs. Western Tiger Salamander
• California Tree Frog vs. Pacific Chorus Frog
• California Tree Frog vs. Red-spotted Toad
• Canadian Toad vs. American Toad
• Canadian Toad vs. Great Plains Toad
• Canadian Toad vs. Woodhouse's Toad
• Cane Toad vs. Oak Toad
• Cane Toad vs. Southern Toad
• Canyon Lizard vs. Common Side-blotched Lizard
• Canyon Lizard vs. Greater Earless Lizard
• Canyon Lizard vs. Ornate Tree Lizard
• Canyon Tree Frog vs. Red-spotted Toad
• Carolina Mountain Dusky Salamander vs. Northern Pygmy Salamander
• Carolina Mountain Dusky Salamander vs. Seal Salamander
• Carolina Sandhills Salamander vs. Mud Salamander
• Carolina Sandhills Salamander vs. Red Salamander
• Carolina Sandhills Salamander vs. Southern Two-lined Salamander
• Carolina Swamp Dusky Salamander vs. Many-lined Salamander
• Carolina Swamp Dusky Salamander vs. Piedmont Dusky Salamander
• Carpenter Frog vs. American Bullfrog
• Carpenter Frog vs. Atlantic Coast Leopard Frog
• Carpenter Frog vs. Green Frog
• Carpenter Frog vs. Southern Leopard Frog
• Cascade Torrent Salamander vs. Dunn's Salamander
• Cascade Torrent Salamander vs. Western Red-backed Salamander
• Cascades Frog vs. Columbia Spotted Frog
• Cascades Frog vs. Northern Red-legged Frog
• Catahoula Spotted Dusky Salamander vs. Southern Red-backed Salamander
• Catahoula Spotted Dusky Salamander vs. Western Dwarf Salamander
• Cave Salamander vs. Long-tailed Salamander
• Central American Indigo Snake vs. Common Coachwhip
• Central American Indigo Snake vs. Desert Kingsnake
• Central Shovel-nosed Dusky Salamander vs. Seal Salamander
• Chamberlain's Dwarf Salamander vs. Coastal Plain Dwarf Salamander
• Channel Islands Slender Salamander vs. Black-bellied Slender Salamander
• Chattahoochee Slimy Salamander vs. Northern Slimy Salamander
• Chattahoochee Slimy Salamander vs. Southern Appalachian Salamander
• Chattooga Dusky Salamander vs. Seal Salamander
• Chattooga Dusky Salamander vs. Spotted Dusky Salamander
• Cheat Mountain Salamander vs. Allegheny Mountain Dusky Salamander
• Cheat Mountain Salamander vs. Eastern Red-backed Salamander
• Cheat Mountain Salamander vs. Four-toed Salamander
• Cheat Mountain Salamander vs. Northern Slimy Salamander
• Cheat Mountain Salamander vs. Wehrle's Salamander
• Checkered Garter Snake vs. Common Garter Snake
• Checkered Garter Snake vs. Lined Snake
• Checkered Garter Snake vs. Plains Garter Snake
• Checkered Garter Snake vs. Two-striped Garter Snake
• Checkered Garter Snake vs. Western Ribbon Snake
• Checkered Garter Snake vs. Western Terrestrial Garter Snake
• Cheoah Bald Salamander vs. Ocoee Salamander
• Cheoah Bald Salamander vs. Southern Appalachian Salamander
• Cherokee Blackbelly Salamander vs. Central Shovel-nosed Dusky Salamander
• Cherokee Blackbelly Salamander vs. Seal Salamander
• Cherokee Blackbelly Salamander vs. Spotted Dusky Salamander
• Cherokee Mountain Dusky Salamander vs. Imitator Salamander
• Cherokee Mountain Dusky Salamander vs. Pygmy Salamander
• Cherokee Mountain Dusky Salamander vs. Santeetlah Dusky Salamander
• Cherokee Mountain Dusky Salamander vs. Seal Salamander
• Cherokee Mountain Dusky Salamander vs. Spotted Dusky Salamander
• Chicken Turtle vs. Pond Slider
• Chicken Turtle vs. River Cooter
• Chicken Turtle vs. Southern Painted Turtle
• Chihuahuan Black-headed Snake vs. Plains Black-headed Snake
• Chihuahuan Black-headed Snake vs. Ring-necked Snake
• Chihuahuan Black-headed Snake vs. Southwestern Blackhead Snake
• Chihuahuan Green Toad vs. Couch's Spadefoot
• Chihuahuan Green Toad vs. Great Plains Toad
• Chihuahuan Green Toad vs. Red-spotted Toad
• Chihuahuan Hook-nosed Snake vs. Ground Snake
• Chihuahuan Hook-nosed Snake vs. Mexican Hognose Snake
• Chihuahuan Mountain Kingsnake vs. Ground Snake
• Chihuahuan Mountain Kingsnake vs. Long-nosed Snake
• Chihuahuan Mountain Kingsnake vs. Sonoran Coralsnake
• Chihuahuan Mud Turtle vs. Yellow Mud Turtle
• Chihuahuan Nightsnake vs. Gopher Snake
• Chihuahuan Nightsnake vs. Prairie Rattlesnake
• Chihuahuan Nightsnake vs. Rock Rattlesnake
• Chihuahuan Nightsnake vs. Sonoran Lyre Snake
• Chihuahuan Nightsnake vs. Western Diamond-backed Rattlesnake
• Chihuahuan Nightsnake vs. Western Massasauga
• Chihuahuan Spotted Whiptail vs. Arizona Striped Whiptail
• Chihuahuan Spotted Whiptail vs. Desert Grassland Whiptail
• Chihuahuan Spotted Whiptail vs. Plateau Striped Whiptail
• Chihuahuan Spotted Whiptail vs. Six-lined Racerunner
• Chihuahuan Spotted Whiptail vs. Sonoran Spotted Whiptail
• Chihuahuan Spotted Whiptail vs. Western Whiptail
• Chinese Softshell Turtle vs. Spiny Softshell
• Chiricahua Leopard Frog vs. American Bullfrog
• Chiricahua Leopard Frog vs. Lowland Leopard Frog
• Chiricahua Leopard Frog vs. Northern Leopard Frog
• Chiricahua Leopard Frog vs. Plains Leopard Frog
• Clark's Spiny Lizard vs. Desert Spiny Lizard
• Clark's Spiny Lizard vs. Ornate Tree Lizard
• Clark's Spiny Lizard vs. Plateau Fence Lizard
• Clark's Spiny Lizard vs. Southwestern Fence Lizard
• Clark's Spiny Lizard vs. Yarrow's Spiny Lizard
• Cliff Chirping Frog vs. Greenhouse Frog
• Cliff Chirping Frog vs. Rio Grande Chirping Frog
• Clouded Salamander vs. Dunn's Salamander
• Clouded Salamander vs. Ensatina
• Clouded Salamander vs. Western Red-backed Salamander
• Coachella Valley Fringe-toed Lizard vs. Mojave Fringe-toed Lizard
• Coachella Valley Fringe-toed Lizard vs. Zebra-tailed Lizard
• Coal Skink vs. Broad-headed Skink
• Coal Skink vs. Common Five-lined Skink
• Coal Skink vs. Little Brown Skink
• Coast Mountain Kingsnake vs. California Kingsnake
• Coast Mountain Kingsnake vs. California Mountain Kingsnake
• Coast Mountain Kingsnake vs. Long-nosed Snake
• Coast Night Snake vs. Desert Nightsnake
• Coast Night Snake vs. Gopher Snake
• Coast Night Snake vs. Western Rattlesnake
• Coastal Plain Cooter vs. Florida Red-bellied Cooter
• Coastal Plain Cooter vs. Northern Red-bellied Cooter
• Coastal Plain Cooter vs. Pond Slider
• Coastal Plain Cooter vs. River Cooter
• Coastal Plain Dwarf Salamander vs. Southern Two-lined Salamander
• Coastal Rosy Boa vs. Northern Rubber Boa
• Coastal Tailed Frog vs. Foothill Yellow-legged Frog
• Coastal Tailed Frog vs. Pacific Chorus Frog
• Coeur d'Alene Salamander vs. Long-toed Salamander
• Collinses' Mountain Chorus Frog vs. Spring Peeper
• Collinses' Mountain Chorus Frog vs. Upland Chorus Frog
• Colorado Checkered Whiptail vs. Common Sagebrush Lizard
• Colorado Checkered Whiptail vs. Common Side-blotched Lizard
• Colorado Checkered Whiptail vs. Great Plains Skink
• Colorado Checkered Whiptail vs. Greater Short-horned Lizard
• Colorado Checkered Whiptail vs. Many-lined Skink
• Colorado Checkered Whiptail vs. Plateau Fence Lizard
• Colorado Checkered Whiptail vs. Plateau Striped Whiptail
• Colorado Checkered Whiptail vs. Prairie Lizard
• Colorado Checkered Whiptail vs. Pygmy Short-horned Lizard
• Colorado Checkered Whiptail vs. Six-lined Racerunner
• Colorado Checkered Whiptail vs. Western Earless Lizard
• Colorado Checkered Whiptail vs. Western Skink
• Colorado Desert Fringe-toed Lizard vs. Coachella Valley Fringe-toed Lizard
• Colorado Desert Fringe-toed Lizard vs. Mojave Fringe-toed Lizard
• Colorado Desert Fringe-toed Lizard vs. Zebra-tailed Lizard
• Colorado Desert Shovelnose Snake vs. Ground Snake
• Colorado Desert Shovelnose Snake vs. Long-nosed Snake
• Columbia Spotted Frog vs. American Bullfrog
• Columbia Spotted Frog vs. Northern Leopard Frog
• Columbia Spotted Frog vs. Wood Frog
• Columbia Torrent Salamander vs. Dunn's Salamander
• Columbia Torrent Salamander vs. Southern Torrent Salamander
• Columbia Torrent Salamander vs. Western Red-backed Salamander
• Common Box Turtle vs. Blanding's Turtle
• Common Box Turtle vs. False Map Turtle
• Common Box Turtle vs. Northern Map Turtle
• Common Box Turtle vs. Ouachita Map Turtle
• Common Box Turtle vs. River Cooter
• Common Box Turtle vs. Spotted Turtle
• Common Butterfly Lizard vs. Giant Ameiva
• Common Butterfly Lizard vs. Six-lined Racerunner
• Common Checkered Whiptail vs. Arizona Striped Whiptail
• Common Checkered Whiptail vs. Chihuahuan Spotted Whiptail
• Common Checkered Whiptail vs. Colorado Checkered Whiptail
• Common Checkered Whiptail vs. Desert Grassland Whiptail
• Common Checkered Whiptail vs. New Mexico Whiptail
• Common Checkered Whiptail vs. Plateau Striped Whiptail
• Common Checkered Whiptail vs. Six-lined Racerunner
• Common Chuckwalla vs. Desert Iguana
• Common Coachwhip vs. North American Racer
• Common Five-lined Skink vs. Broad-headed Skink
• Common Four-clawed Gecko vs. Asian House Gecko
• Common Four-clawed Gecko vs. Mourning Gecko
• Common Garter Snake vs. Common Ribbon Snake
• Common Garter Snake vs. Plains Garter Snake
• Common Garter Snake vs. Western Ribbon Snake
• Common Mudpuppy vs. Western Lesser Siren
• Common Ribbon Snake vs. Western Ribbon Snake
• Common Sagebrush Lizard vs. Greater Short-horned Lizard
• Common Sagebrush Lizard vs. Prairie Lizard
• Common Sagebrush Lizard vs. Southwestern Fence Lizard
• Common Sagebrush Lizard vs. Western Earless Lizard
• Common Sharp-tailed Snake vs. Ring-necked Snake
• Common Side-blotched Lizard vs. Common Sagebrush Lizard
• Common Side-blotched Lizard vs. Desert Collared Lizard
• Common Side-blotched Lizard vs. Desert Horned Lizard
• Common Side-blotched Lizard vs. Greater Short-horned Lizard
• Common Side-blotched Lizard vs. Long-nosed Leopard Lizard
• Common Side-blotched Lizard vs. Northern Alligator Lizard
• Common Side-blotched Lizard vs. Ornate Tree Lizard
• Common Side-blotched Lizard vs. Plateau Fence Lizard
• Common Side-blotched Lizard vs. Pygmy Short-horned Lizard
• Common Side-blotched Lizard vs. Western Earless Lizard
• Common Side-blotched Lizard vs. Western Fence Lizard
• Common Side-blotched Lizard vs. Western Whiptail
• Common Snapping Turtle vs. Blanding's Turtle
• Common Snapping Turtle vs. Common Box Turtle
• Common Snapping Turtle vs. Eastern Musk Turtle
• Common Snapping Turtle vs. False Map Turtle
• Common Snapping Turtle vs. Northern Map Turtle
• Common Snapping Turtle vs. Ornate Box Turtle
• Common Snapping Turtle vs. Ouachita Map Turtle
• Common Snapping Turtle vs. Painted Turtle
• Common Snapping Turtle vs. Pond Slider
• Common Snapping Turtle vs. River Cooter
• Common Snapping Turtle vs. Spotted Turtle
• Common Spotted Whiptail vs. Arizona Striped Whiptail
• Common Spotted Whiptail vs. Chihuahuan Spotted Whiptail
• Common Spotted Whiptail vs. Common Checkered Whiptail
• Common Spotted Whiptail vs. Six-lined Racerunner
• Common Sun Skink vs. Southeastern Five-lined Skink
• Common Watersnake vs. Diamondback Watersnake
• Common Watersnake vs. Plain-bellied Watersnake
• Concho Watersnake vs. Diamondback Watersnake
• Concho Watersnake vs. Plain-bellied Watersnake
• Cope's Giant Salamander vs. Northwestern Salamander
• Cope's Giant Salamander vs. Pacific Giant Salamander
• Cope's Leopard Lizard vs. Baja California Collared Lizard
• Cope's Leopard Lizard vs. Long-nosed Leopard Lizard
• Couch's Spadefoot vs. Great Plains Toad
• Couch's Spadefoot vs. Plains Spadefoot
• Couch's Spadefoot vs. Red-spotted Toad
• Couch's Spadefoot vs. Woodhouse's Toad
• Cow Knob Salamander vs. Shenandoah Mountain Salamander
• Cow Knob Salamander vs. White-spotted Slimy Salamander
• Crawfish Frog vs. Northern Leopard Frog
• Crested Anole vs. Brown Anole
• Crested Anole vs. Hispaniolan Stout Anole
• Crevice Spiny Lizard vs. Clark's Spiny Lizard
• Crevice Spiny Lizard vs. Eastern Collared Lizard
• Crevice Spiny Lizard vs. Southwestern Fence Lizard
• Crevice Spiny Lizard vs. Twin-spotted Spiny Lizard
• Crevice Spiny Lizard vs. Yarrow's Spiny Lizard
• Cuban Treefrog vs. Barking Treefrog
• Cuban Treefrog vs. Bird-voiced Treefrog
• Cuban Treefrog vs. Cope's Gray Tree Frog
• Cuban Treefrog vs. Green Treefrog
• Cuban Treefrog vs. Pine Woods Treefrog
• Cuban Treefrog vs. Squirrel Treefrog
• Cumberland Dusky Salamander vs. Northern Dusky Salamander
• Cumberland Plateau Salamander vs. Northern Slimy Salamander
• Dark-sided Salamander vs. Cave Salamander
• Dark-sided Salamander vs. Long-tailed Salamander
• DeKay's Brownsnake vs. Common Garter Snake
• Del Norte Salamander vs. California Slender Salamander
• Del Norte Salamander vs. Clouded Salamander
• Del Norte Salamander vs. Dunn's Salamander
• Del Norte Salamander vs. Klamath Black Salamander
• Del Norte Salamander vs. Siskiyou Mountains Salamander
• Del Norte Salamander vs. Southern Torrent Salamander
• Del Norte Salamander vs. Western Red-backed Salamander
• Desert Coachwhip vs. Baja California Coachwhip
• Desert Coachwhip vs. Common Coachwhip
• Desert Coachwhip vs. North American Racer
• Desert Coachwhip vs. Striped Racer
• Desert Coachwhip vs. Striped Whipsnake
• Desert Collared Lizard vs. Common Sagebrush Lizard
• Desert Collared Lizard vs. Desert Horned Lizard
• Desert Collared Lizard vs. Desert Spiny Lizard
• Desert Collared Lizard vs. Granite Spiny Lizard
• Desert Collared Lizard vs. Greater Short-horned Lizard
• Desert Collared Lizard vs. Northern Alligator Lizard
• Desert Collared Lizard vs. Pygmy Short-horned Lizard
• Desert Grassland Whiptail vs. Plateau Striped Whiptail
• Desert Grassland Whiptail vs. Sonoran Spotted Whiptail
• Desert Grassland Whiptail vs. Western Whiptail
• Desert Horned Lizard vs. Common Sagebrush Lizard
• Desert Horned Lizard vs. Greater Short-horned Lizard
• Desert Horned Lizard vs. Northern Alligator Lizard
• Desert Horned Lizard vs. Pygmy Short-horned Lizard
• Desert Kingsnake vs. California Kingsnake
• Desert Kingsnake vs. Common Coachwhip
• Desert Kingsnake vs. Speckled Kingsnake
• Desert Night Lizard vs. Common Side-blotched Lizard
• Desert Night Lizard vs. Mediterranean Gecko
• Desert Night Lizard vs. Western Banded Gecko
• Desert Nightsnake vs. Glossy Snake
• Desert Nightsnake vs. Gopher Snake
• Desert Nightsnake vs. Western Rattlesnake
• Desert Rosy Boa vs. Coastal Rosy Boa
• Desert Spiny Lizard vs. Common Sagebrush Lizard
• Desert Spiny Lizard vs. Ornate Tree Lizard
• Desert Spiny Lizard vs. Southern Sagebrush Lizard
• Desert Spiny Lizard vs. Western Fence Lizard
• Diamondback Terrapin vs. Common Snapping Turtle
• Diamondback Terrapin vs. Eastern Musk Turtle
• Dixie Caverns Salamander vs. Blacksburg Salamander
• Dixie Caverns Salamander vs. White-spotted Slimy Salamander
• Dixie Valley Toad vs. Great Basin Spadefoot
• Dixie Valley Toad vs. Western Toad
• Dunes Sagebrush Lizard vs. Common Side-blotched Lizard
• Dunes Sagebrush Lizard vs. Prairie Lizard
• Dunes Sagebrush Lizard vs. Southwestern Fence Lizard
• Dunes Sagebrush Lizard vs. Western Earless Lizard
• Dunn's Salamander vs. Ensatina
• Dunn's Salamander vs. Wandering Salamander
• Dunn's Salamander vs. Western Red-backed Salamander
• Dusky Giant Ameiva vs. Giant Whiptail
• Dusky Gopher Frog vs. Southern Leopard Frog
• Dwarf Black-bellied Salamander vs. Seal Salamander
• Dwarf Black-bellied Salamander vs. Southern Blackbelly Salamander
• Dwarf Waterdog vs. Greater Siren
• Dwarf Waterdog vs. Two-toed Amphiuma
• Eastern Black-tailed Rattlesnake vs. Mojave Rattlesnake
• Eastern Black-tailed Rattlesnake vs. Prairie Rattlesnake
• Eastern Black-tailed Rattlesnake vs. Ridge-nosed Rattlesnake
• Eastern Black-tailed Rattlesnake vs. Rock Rattlesnake
• Eastern Black-tailed Rattlesnake vs. Timber Rattlesnake
• Eastern Black-tailed Rattlesnake vs. Twin-spotted Rattlesnake
• Eastern Black-tailed Rattlesnake vs. Western Black-tailed Rattlesnake
• Eastern Black-tailed Rattlesnake vs. Western Diamond-backed Rattlesnake
• Eastern Black-tailed Rattlesnake vs. Western Massasauga
• Eastern Collared Lizard vs. Desert Collared Lizard
• Eastern Collared Lizard vs. Long-nosed Leopard Lizard
• Eastern Collared Lizard vs. Yarrow's Spiny Lizard
• Eastern Copperhead vs. Common Watersnake
• Eastern Copperhead vs. Diamondback Watersnake
• Eastern Copperhead vs. Plain-bellied Watersnake
• Eastern Coralsnake vs. Scarlet Kingsnake
• Eastern Coralsnake vs. Scarletsnake
• Eastern Diamond-backed Rattlesnake vs. Pygmy Rattlesnake
• Eastern Diamond-backed Rattlesnake vs. Timber Rattlesnake
• Eastern Foxsnake vs. Central Ratsnake
• Eastern Foxsnake vs. Eastern Milksnake
• Eastern Indigo Snake vs. Common Coachwhip
• Eastern Indigo Snake vs. North American Racer
• Eastern Kingsnake vs. Black Kingsnake
• Eastern Kingsnake vs. Central Ratsnake
• Eastern Milksnake vs. Central Ratsnake
• Eastern Mud Turtle vs. Common Snapping Turtle
• Eastern Mud Turtle vs. Diamondback Terrapin
• Eastern Mud Turtle vs. Eastern Musk Turtle
• Eastern Musk Turtle vs. Blanding's Turtle
• Eastern Musk Turtle vs. Common Box Turtle
• Eastern Musk Turtle vs. False Map Turtle
• Eastern Musk Turtle vs. Northern Map Turtle
• Eastern Musk Turtle vs. Ornate Box Turtle
• Eastern Musk Turtle vs. Ouachita Map Turtle
• Eastern Musk Turtle vs. Painted Turtle
• Eastern Musk Turtle vs. Pond Slider
• Eastern Musk Turtle vs. River Cooter
• Eastern Musk Turtle vs. Spotted Turtle
• Eastern Newt vs. Cave Salamander
• Eastern Ratsnake vs. Central Ratsnake
• Eastern Ratsnake vs. North American Racer
• Eastern Ratsnake vs. Red Cornsnake
• Eastern Red-backed Salamander vs. Northern Zigzag Salamander
• Eastern Spadefoot vs. American Toad
• Eastern Spadefoot vs. Fowler's Toad
• Elegant Earless Lizard vs. Common Side-blotched Lizard
• Elegant Earless Lizard vs. Western Earless Lizard
• Elegant Earless Lizard vs. Zebra-tailed Lizard
• Ensatina vs. California Newt
• Ensatina vs. California Tiger Salamander
• Ensatina vs. Del Norte Salamander
• Ensatina vs. Rough-skinned Newt
• Ensatina vs. Sierra Newt
• Ensatina vs. Speckled Black Salamander
• Ensatina vs. Wandering Salamander
• Escambia Map Turtle vs. Barbour's Map Turtle
• Escambia Waterdog vs. Gulf Coast Waterdog
• Escambia Waterdog vs. Lesser Siren
• Escambia Waterdog vs. One-toed Amphiuma
• Escambia Waterdog vs. Two-toed Amphiuma
• Fairview Slender Salamander vs. Greenhorn Mountains Slender Salamander
• Fairview Slender Salamander vs. Gregarious Slender Salamander
• Fairview Slender Salamander vs. Kern Canyon Slender Salamander
• Fairview Slender Salamander vs. Kern Plateau Slender Salamander
• Fairview Slender Salamander vs. Relictual Slender Salamander
• Fairview Slender Salamander vs. Tehachapi Slender Salamander
• False Map Turtle vs. Blanding's Turtle
• False Map Turtle vs. Northern Map Turtle
• False Map Turtle vs. Ouachita Map Turtle
• False Map Turtle vs. Spotted Turtle
• Fern Bank Salamander vs. Cascade Caverns Salamander
• Fern Bank Salamander vs. San Marcos Salamander
• Fern Bank Salamander vs. Texas Blind Salamander
• Flat-headed Salamander vs. Northern Dusky Salamander
• Flat-headed Salamander vs. Seal Salamander
• Flat-headed Salamander vs. Wolf Dusky Salamander
• Flat-headed Snake vs. Common Wormsnake
• Flat-headed Snake vs. Smooth Earthsnake
• Flat-tailed Horned Lizard vs. Blainville's Horned Lizard
• Flat-tailed Horned Lizard vs. Desert Horned Lizard
• Flat-tailed House Gecko vs. Asian House Gecko
• Flat-tailed House Gecko vs. Common Four-clawed Gecko
• Flat-tailed House Gecko vs. Indo-Pacific House Gecko
• Flat-tailed House Gecko vs. Indo-Pacific Slender Gecko
• Flat-tailed House Gecko vs. Mediterranean Gecko
• Flat-tailed House Gecko vs. Moorish Gecko
• Flat-tailed House Gecko vs. Mourning Gecko
• Flat-tailed House Gecko vs. Tropical House Gecko
• Flattened Musk Turtle vs. Eastern Musk Turtle
• Flattened Musk Turtle vs. Stripe-necked Musk Turtle
• Florida Bog Frog vs. American Bullfrog
• Florida Bog Frog vs. Green Frog
• Florida Bog Frog vs. Pig Frog
• Florida Brownsnake vs. Red-bellied Snake
• Florida Brownsnake vs. Ring-necked Snake
• Florida Brownsnake vs. Rough Earthsnake
• Florida Brownsnake vs. Smooth Earthsnake
• Florida Cottonmouth vs. Banded Watersnake
• Florida Cottonmouth vs. Brown Watersnake
• Florida Cottonmouth vs. Eastern Copperhead
• Florida Cottonmouth vs. Northern Cottonmouth
• Florida Cottonmouth vs. Plain-bellied Watersnake
• Florida Crowned Snake vs. Florida Brownsnake
• Florida Crowned Snake vs. Rough Earthsnake
• Florida Crowned Snake vs. Southeastern Crowned Snake
• Florida Green Watersnake vs. Banded Watersnake
• Florida Green Watersnake vs. Brown Watersnake
• Florida Green Watersnake vs. Florida Cottonmouth
• Florida Green Watersnake vs. Northern Cottonmouth
• Florida Green Watersnake vs. Plain-bellied Watersnake
• Florida Green Watersnake vs. Saltmarsh Snake
• Florida Kingsnake vs. Eastern Kingsnake
• Florida Mud Turtle vs. Eastern Mud Turtle
• Florida Mud Turtle vs. Eastern Musk Turtle
• Florida Mud Turtle vs. Loggerhead Musk Turtle
• Florida Mud Turtle vs. Striped Mud Turtle
• Florida Red-bellied Cooter vs. Northern Red-bellied Cooter
• Florida Red-bellied Cooter vs. Northwestern Pond Turtle
• Florida Red-bellied Cooter vs. Painted Turtle
• Florida Red-bellied Cooter vs. Pond Slider
• Florida Red-bellied Cooter vs. River Cooter
• Florida Red-bellied Cooter vs. Southwestern Pond Turtle
• Florida Sand Skink vs. Eastern Glass Lizard
• Florida Sand Skink vs. Florida Worm Lizard
• Florida Sand Skink vs. Island Glass Lizard
• Florida Sand Skink vs. Little Brown Skink
• Florida Sand Skink vs. Mole Skink
• Florida Sand Skink vs. Slender Glass Lizard
• Florida Scrub Lizard vs. Eastern Fence Lizard
• Florida Softshell Turtle vs. Spiny Softshell
• Florida Worm Lizard vs. Brahminy Blindsnake
• Foothill Yellow-legged Frog vs. American Bullfrog
• Foothill Yellow-legged Frog vs. Cascades Frog
• Foothill Yellow-legged Frog vs. Northern Red-legged Frog
• Foothills Dusky Salamander vs. Seal Salamander
• Forest Sharp-tailed Snake vs. Common Sharp-tailed Snake
• Four-lined Skink vs. Broad-headed Skink
• Four-lined Skink vs. Common Five-lined Skink
• Four-lined Skink vs. Many-lined Skink
• Four-lined Skink vs. Prairie Skink
• Four-toed Salamander vs. Eastern Red-backed Salamander
• Four-toed Salamander vs. Northern Dusky Salamander
• Four-toed Salamander vs. Northern Ravine Salamander
• Fourche Mountain Salamander vs. Rich Mountain Salamander
• Fourche Mountain Salamander vs. Southern Red-backed Salamander
• Fourche Mountain Salamander vs. Western Slimy Salamander
• Frosted Flatwoods Salamander vs. Marbled Salamander
• Frosted Flatwoods Salamander vs. Mole Salamander
• Gabilan Mountains Slender Salamander vs. Black-bellied Slender Salamander
• Gabilan Mountains Slender Salamander vs. California Slender Salamander
• Gabilan Mountains Slender Salamander vs. Santa Lucia Mountains Slender Salamander
• Georgetown Salamander vs. Jollyville Plateau Salamander
• Georgetown Salamander vs. Salado Salamander
• Georgia Blind Salamander vs. Three-lined Salamander
• Giant Ameiva vs. Dusky Giant Ameiva
• Giant Ameiva vs. Giant Whiptail
• Giant Ameiva vs. Rainbow Whiptail
• Giant Ameiva vs. Six-lined Racerunner
• Giant Garter Snake vs. Aquatic Garter Snake
• Giant Garter Snake vs. Common Garter Snake
• Giant Garter Snake vs. Sierra Garter Snake
• Giant Garter Snake vs. Western Terrestrial Garter Snake
• Giant Spotted Whiptail vs. Chihuahuan Spotted Whiptail
• Giant Spotted Whiptail vs. Desert Grassland Whiptail
• Giant Spotted Whiptail vs. Sonoran Spotted Whiptail
• Giant Spotted Whiptail vs. Western Whiptail
• Giant Toad vs. Gulf Coast Toad
• Giant Whiptail vs. Six-lined Racerunner
• Gila Monster vs. Common Chuckwalla
• Gilbert's Skink vs. Western Skink
• Glossy Snake vs. Gopher Snake
• Glossy Snake vs. Great Plains Ratsnake
• Glossy Snake vs. Western Ratsnake
• Glossy Swampsnake vs. Banded Watersnake
• Glossy Swampsnake vs. Common Watersnake
• Glossy Swampsnake vs. Diamondback Watersnake
• Glossy Swampsnake vs. Graham's Crawfish Snake
• Glossy Swampsnake vs. Mississippi Green Watersnake
• Glossy Swampsnake vs. Plain-bellied Watersnake
• Glossy Swampsnake vs. Queensnake
• Gopher Frog vs. Southern Leopard Frog
• Graham's Crawfish Snake vs. Common Watersnake
• Graham's Crawfish Snake vs. Queensnake
• Granite Night Lizard vs. Desert Night Lizard
• Granite Night Lizard vs. Peninsular Leaf-toed Gecko
• Granite Night Lizard vs. Western Banded Gecko
• Granite Spiny Lizard vs. Common Side-blotched Lizard
• Granite Spiny Lizard vs. Desert Spiny Lizard
• Granite Spiny Lizard vs. Ornate Tree Lizard
• Granite Spiny Lizard vs. Southern Sagebrush Lizard
• Granite Spiny Lizard vs. Western Fence Lizard
• Graphic Spiny Lizard vs. Ornate Tree Lizard
• Graphic Spiny Lizard vs. Texas Spiny Lizard
• Gray Checkered Whiptail vs. Chihuahuan Spotted Whiptail
• Gray Checkered Whiptail vs. Common Checkered Whiptail
• Gray Checkered Whiptail vs. Sonoran Spotted Whiptail
• Gray Checkered Whiptail vs. Western Whiptail
• Gray-banded Kingsnake vs. Rock Rattlesnake
• Gray-banded Kingsnake vs. Western Milksnake
• Great Balsams Mountain Dusky Salamander vs. Pygmy Salamander
• Great Balsams Mountain Dusky Salamander vs. Santeetlah Dusky Salamander
• Great Balsams Mountain Dusky Salamander vs. Seal Salamander
• Great Basin Spadefoot vs. Plains Spadefoot
• Great Basin Spadefoot vs. Red-spotted Toad
• Great Basin Spadefoot vs. Western Toad
• Great Basin Spadefoot vs. Woodhouse's Toad
• Great Basin Spadefoot vs. Yosemite Toad
• Great Plains Ground Snake vs. Chihuahuan Hook-nosed Snake
• Great Plains Ground Snake vs. Chihuahuan Nightsnake
• Great Plains Ground Snake vs. DeKay's Brownsnake
• Great Plains Ground Snake vs. Flat-headed Snake
• Great Plains Ground Snake vs. Ground Snake
• Great Plains Ground Snake vs. Long-nosed Snake
• Great Plains Ground Snake vs. Plains Black-headed Snake
• Great Plains Ground Snake vs. Ring-necked Snake
• Great Plains Ground Snake vs. Smooth Earthsnake
• Great Plains Ground Snake vs. Southwestern Blackhead Snake
• Great Plains Ground Snake vs. Western Milksnake
• Great Plains Ground Snake vs. Western Wormsnake
• Great Plains Ratsnake vs. Central Ratsnake
• Great Plains Ratsnake vs. Eastern Milksnake
• Great Plains Ratsnake vs. Prairie Kingsnake
• Great Plains Skink vs. Broad-headed Skink
• Great Plains Skink vs. Coal Skink
• Great Plains Skink vs. Common Five-lined Skink
• Great Plains Skink vs. Little Brown Skink
• Great Plains Skink vs. Prairie Skink
• Great Plains Toad vs. American Toad
• Great Plains Toad vs. Arroyo Toad
• Great Plains Toad vs. Fowler's Toad
• Great Plains Toad vs. Western Spadefoot
• Great Plains Toad vs. Woodhouse's Toad
• Greater Earless Lizard vs. Common Side-blotched Lizard
• Greater Earless Lizard vs. Elegant Earless Lizard
• Greater Earless Lizard vs. Western Earless Lizard
• Greater Earless Lizard vs. Zebra-tailed Lizard
• Greater Short-horned Lizard vs. Prairie Lizard
• Greater Siren vs. Two-toed Amphiuma
• Green Anole vs. Brown Anole
• Green Anole vs. Gold Dust Day Gecko
• Green Sea Turtle vs. Kemp's Ridley Sea Turtle
• Green Sea Turtle vs. Loggerhead Sea Turtle
• Green Treefrog vs. Cope's Gray Tree Frog
• Green Treefrog vs. Gray Treefrog
• Greenhorn Mountains Slender Salamander vs. Gregarious Slender Salamander
• Greenhorn Mountains Slender Salamander vs. Inyo Mountains Salamander
• Greenhorn Mountains Slender Salamander vs. Tehachapi Slender Salamander
• Greenhouse Frog vs. Common Coqui
• Gregarious Slender Salamander vs. Black-bellied Slender Salamander
• Ground Snake vs. Coast Mountain Kingsnake
• Ground Snake vs. Western Milksnake
• Gulf Coast Mud Salamander vs. Red Salamander
• Gulf Coast Toad vs. American Toad
• Gulf Coast Toad vs. Fowler's Toad
• Gulf Coast Toad vs. Great Plains Toad
• Gulf Coast Toad vs. Red-spotted Toad
• Gulf Coast Toad vs. Texas Toad
• Gulf Coast Toad vs. Woodhouse's Toad
• Hawksbill Sea Turtle vs. Green Sea Turtle
• Hawksbill Sea Turtle vs. Loggerhead Sea Turtle
• Hawksbill Sea Turtle vs. Olive Ridley Sea Turtle
• Hell Hollow Slender Salamander vs. California Slender Salamander
• Hell Hollow Slender Salamander vs. Gregarious Slender Salamander
• Hellbender vs. Common Mudpuppy
• Hillis's Dwarf Salamander vs. Coastal Plain Dwarf Salamander
• Hillis's Dwarf Salamander vs. Four-toed Salamander
• Hillis's Dwarf Salamander vs. Southern Two-lined Salamander
• Hispaniolan Green Anole vs. Green Anole
• Hispaniolan Green Anole vs. Knight Anole
• Hispaniolan Khaki Curlytail vs. Northern Curly-tailed Lizard
• Hispaniolan Khaki Curlytail vs. Peters's Rock Agama
• Hispaniolan Stout Anole vs. Brown Anole
• Holbrook's Southern Dusky Salamander vs. Apalachicola Dusky Salamander
• Holbrook's Southern Dusky Salamander vs. Carolina Swamp Dusky Salamander
• Holbrook's Southern Dusky Salamander vs. Many-lined Salamander
• Holbrook's Southern Dusky Salamander vs. Southeastern Slimy Salamander
• Hot Creek Toad vs. Great Basin Spadefoot
• Hot Creek Toad vs. Western Toad
• Houston Toad vs. Fowler's Toad
• Houston Toad vs. Gulf Coast Toad
• Houston Toad vs. Texas Toad
• Houston Toad vs. Woodhouse's Toad
• Hurter's Spadefoot vs. Couch's Spadefoot
• Hurter's Spadefoot vs. Plains Spadefoot
• Idaho Giant Salamander vs. Western Tiger Salamander
• Illinois Chorus Frog vs. Boreal Chorus Frog
• Illinois Chorus Frog vs. Spring Peeper
• Illinois Chorus Frog vs. Upland Chorus Frog
• Illinois Chorus Frog vs. Western Chorus Frog
• Imitator Salamander vs. Red-cheeked Salamander
• Imitator Salamander vs. Santeetlah Dusky Salamander
• Imitator Salamander vs. Seal Salamander
• Imitator Salamander vs. Spotted Dusky Salamander
• Indo-Pacific House Gecko vs. Asian House Gecko
• Indo-Pacific House Gecko vs. Common Four-clawed Gecko
• Indo-Pacific House Gecko vs. Indo-Pacific Slender Gecko
• Indo-Pacific House Gecko vs. Mediterranean Gecko
• Indo-Pacific House Gecko vs. Moorish Gecko
• Indo-Pacific House Gecko vs. Mourning Gecko
• Indo-Pacific Slender Gecko vs. Asian House Gecko
• Indo-Pacific Slender Gecko vs. Common Four-clawed Gecko
• Indo-Pacific Slender Gecko vs. Mourning Gecko
• Intermediate Musk Turtle vs. Eastern Musk Turtle
• Intermediate Musk Turtle vs. Loggerhead Musk Turtle
• Intermediate Musk Turtle vs. Stripe-necked Musk Turtle
• Inyo Mountains Salamander vs. Gregarious Slender Salamander
• Island Fence Lizard vs. Common Side-blotched Lizard
• Island Glass Lizard vs. Eastern Glass Lizard
• Island Glass Lizard vs. Slender Glass Lizard
• Island Night Lizard vs. Common Side-blotched Lizard
• Italian Wall Lizard vs. Common Side-blotched Lizard
• Italian Wall Lizard vs. Western Fence Lizard
• Italian Wall Lizard vs. Western Whiptail
• Jamaican Giant Anole vs. Green Anole
• Jamaican Giant Anole vs. Knight Anole
• Jefferson Salamander vs. Blue-spotted Salamander
• Jefferson Salamander vs. Mole Salamander
• Jefferson Salamander vs. Northern Slimy Salamander
• Jemez Mountains Salamander vs. Western Tiger Salamander
• Junaluska Salamander vs. Long-tailed Salamander
• Junaluska Salamander vs. Southern Two-lined Salamander
• Kanawha Blackbelly Salamander vs. Northern Dusky Salamander
• Kanawha Blackbelly Salamander vs. Northern Shovel-nosed Salamander
• Kanawha Blackbelly Salamander vs. Seal Salamander
• Keeled Earless Lizard vs. Greater Earless Lizard
• Keeled Earless Lizard vs. Western Earless Lizard
• Keeled Rock Gecko vs. Mediterranean Gecko
• Keeled Rock Gecko vs. Moorish Gecko
• Keeled Rock Gecko vs. Peninsular Leaf-toed Gecko
• Keeled Rock Gecko vs. Western Banded Gecko
• Kern Canyon Slender Salamander vs. Black-bellied Slender Salamander
• Kern Canyon Slender Salamander vs. Greenhorn Mountains Slender Salamander
• Kern Canyon Slender Salamander vs. Gregarious Slender Salamander
• Kern Canyon Slender Salamander vs. Tehachapi Slender Salamander
• Kern Plateau Slender Salamander vs. Greenhorn Mountains Slender Salamander
• Kern Plateau Slender Salamander vs. Gregarious Slender Salamander
• Kern Plateau Slender Salamander vs. Inyo Mountains Salamander
• Kern Plateau Slender Salamander vs. Kern Canyon Slender Salamander
• Kern Plateau Slender Salamander vs. Mount Lyell Salamander
• Kern Plateau Slender Salamander vs. Relictual Slender Salamander
• Kern Plateau Slender Salamander vs. Tehachapi Slender Salamander
• Khanh Hoa Narrow-disked Gecko vs. Tokay Gecko
• Khanh Hoa Narrow-disked Gecko vs. Tropical House Gecko
• Kings River Slender Salamander vs. Gregarious Slender Salamander
• Kirtland's Snake vs. Common Watersnake
• Klamath Black Salamander vs. Clouded Salamander
• Klamath Black Salamander vs. Speckled Black Salamander
• Klamath Black Salamander vs. Wandering Salamander
• Knight Anole vs. Green Anole
• Knight Anole vs. Green Iguana
• Larch Mountain Salamander vs. Cascade Torrent Salamander
• Larch Mountain Salamander vs. Clouded Salamander
• Larch Mountain Salamander vs. Dunn's Salamander
• Larch Mountain Salamander vs. Oregon Slender Salamander
• Larch Mountain Salamander vs. Western Red-backed Salamander
• Laredo Striped Whiptail vs. Common Spotted Whiptail
• Laredo Striped Whiptail vs. Six-lined Racerunner
• Lesser Siren vs. Dwarf Waterdog
• Lesser Siren vs. Greater Siren
• Lesser Siren vs. Two-toed Amphiuma
• Lesser Slender Salamander vs. Black-bellied Slender Salamander
• Lesser Slender Salamander vs. Gabilan Mountains Slender Salamander
• Limestone Salamander vs. Ensatina
• Limestone Salamander vs. Hell Hollow Slender Salamander
• Lined Snake vs. Common Garter Snake
• Lined Snake vs. Plains Garter Snake
• Lined Snake vs. Western Ribbon Snake
• Little Brown Skink vs. Broad-headed Skink
• Little Brown Skink vs. Common Five-lined Skink
• Little Grass Frog vs. Spring Peeper
• Loggerhead Musk Turtle vs. Eastern Musk Turtle
• Loggerhead Musk Turtle vs. Stripe-necked Musk Turtle
• Loggerhead Sea Turtle vs. Kemp's Ridley Sea Turtle
• Long-nosed Leopard Lizard vs. Common Sagebrush Lizard
• Long-nosed Leopard Lizard vs. Desert Collared Lizard
• Long-nosed Leopard Lizard vs. Desert Horned Lizard
• Long-nosed Leopard Lizard vs. Greater Short-horned Lizard
• Long-nosed Leopard Lizard vs. Northern Alligator Lizard
• Long-nosed Leopard Lizard vs. Pygmy Short-horned Lizard
• Long-nosed Snake vs. California Kingsnake
• Long-nosed Snake vs. California Mountain Kingsnake
• Long-nosed Snake vs. Ground Snake
• Long-nosed Snake vs. Western Milksnake
• Long-tailed Brush Lizard vs. Common Side-blotched Lizard
• Long-tailed Brush Lizard vs. Ornate Tree Lizard
• Long-tailed Brush Lizard vs. Western Fence Lizard
• Long-tailed Salamander vs. Southern Two-lined Salamander
• Louisiana Pinesnake vs. Prairie Kingsnake
• Louisiana Pinesnake vs. Slowinski's Cornsnake
• Louisiana Pinesnake vs. Western Ratsnake
• Lowland Leopard Frog vs. American Bullfrog
• Lowland Leopard Frog vs. Northern Leopard Frog
• Lowland Leopard Frog vs. Plains Leopard Frog
• Mabee's Salamander vs. Atlantic Coast Slimy Salamander
• Mabee's Salamander vs. Mole Salamander
• Madagascar Giant Day Gecko vs. Gold Dust Day Gecko
• Madagascar Giant Day Gecko vs. Green Anole
• Many-lined Salamander vs. Southern Two-lined Salamander
• Many-lined Salamander vs. Wolf Dusky Salamander
• Many-lined Skink vs. Great Plains Skink
• Many-lined Skink vs. Little Brown Skink
• Many-ribbed Salamander vs. Cave Salamander
• Marbled Whiptail vs. Chihuahuan Spotted Whiptail
• Marbled Whiptail vs. Common Checkered Whiptail
• Marbled Whiptail vs. Common Spotted Whiptail
• Marbled Whiptail vs. Gray Checkered Whiptail
• Marbled Whiptail vs. New Mexico Whiptail
• Marbled Whiptail vs. Sonoran Spotted Whiptail
• Marbled Whiptail vs. Western Whiptail
• Max Patch Dusky Salamander vs. Seal Salamander
• Mesoamerican Slider vs. Pond Slider
• Mesoamerican Slider vs. Rio Grande Cooter
• Mexican Burrowing Toad vs. Sheep Frog
• Mexican Burrowing Toad vs. Western Narrow-mouthed Toad
• Mexican Garter Snake vs. Black-necked Garter Snake
• Mexican Garter Snake vs. Checkered Garter Snake
• Mexican Garter Snake vs. Western Ribbon Snake
• Mexican Garter Snake vs. Western Terrestrial Garter Snake
• Mexican Spadefoot vs. Couch's Spadefoot
• Mexican Spadefoot vs. Great Basin Spadefoot
• Mexican Spadefoot vs. Great Plains Toad
• Mexican Spadefoot vs. Plains Spadefoot
• Mexican Spadefoot vs. Red-spotted Toad
• Mexican Spadefoot vs. Woodhouse's Toad
• Mexican Treefrog vs. Canyon Tree Frog
• Mexican Treefrog vs. Green Treefrog
• Mexican Treefrog vs. Lowland Burrowing Tree Frog
• Mexican Treefrog vs. Squirrel Treefrog
• Mexican White-lipped Frog vs. Mexican Treefrog
• Mexican White-lipped Frog vs. Rio Grande Leopard Frog
• Midland Mud Salamander vs. Cave Salamander
• Midland Mud Salamander vs. Long-tailed Salamander
• Midland Mud Salamander vs. Red Salamander
• Mimic Glass Lizard vs. Eastern Glass Lizard
• Mimic Glass Lizard vs. Slender Glass Lizard
• Mink Frog vs. American Bullfrog
• Mink Frog vs. Green Frog
• Mink Frog vs. Northern Leopard Frog
• Mississippi Green Watersnake vs. Common Watersnake
• Mississippi Green Watersnake vs. Diamondback Watersnake
• Mississippi Green Watersnake vs. Plain-bellied Watersnake
• Mississippi Mud Turtle vs. Eastern Mud Turtle
• Mississippi Mud Turtle vs. Eastern Musk Turtle
• Mississippi Mud Turtle vs. Razor-backed Musk Turtle
• Mississippi Mud Turtle vs. Yellow Mud Turtle
• Mohawk Dunes Fringe-toed Lizard vs. Zebra-tailed Lizard
• Mojave Fringe-toed Lizard vs. Zebra-tailed Lizard
• Mojave Rattlesnake vs. Red Diamond Rattlesnake
• Mojave Rattlesnake vs. Sidewinder
• Mojave Rattlesnake vs. Sonoran Lyre Snake
• Mojave Rattlesnake vs. Southwestern Speckled Rattlesnake
• Mojave Rattlesnake vs. Western Rattlesnake
• Mojave Shovelnose Snake vs. Colorado Desert Shovelnose Snake
• Mojave Shovelnose Snake vs. Ground Snake
• Mojave Shovelnose Snake vs. Long-nosed Snake
• Mole Kingsnake vs. Central Ratsnake
• Mole Kingsnake vs. Eastern Copperhead
• Mole Kingsnake vs. Eastern Milksnake
• Mole Kingsnake vs. Prairie Kingsnake
• Mole Kingsnake vs. Red Cornsnake
• Mole Salamander vs. Small-mouthed Salamander
• Mole Skink vs. Coal Skink
• Mole Skink vs. Common Five-lined Skink
• Mole Skink vs. Little Brown Skink
• Mole Skink vs. Southeastern Five-lined Skink
• Moorish Gecko vs. Mediterranean Gecko
• Moth Skink vs. Dark-flecked Garden Sunskink
• Moth Skink vs. Mottled Snake-eyed Skink
• Mottled Snake-eyed Skink vs. Dark-flecked Garden Sunskink
• Mount Lyell Salamander vs. Ensatina
• Mount Lyell Salamander vs. Inyo Mountains Salamander
• Mount Lyell Salamander vs. Limestone Salamander
• Mountain Chorus Frog vs. Spring Peeper
• Mountain Chorus Frog vs. Western Chorus Frog
• Mountain Patch-nosed Snake vs. Black-necked Garter Snake
• Mountain Patch-nosed Snake vs. Sonoran Whipsnake
• Mountain Patch-nosed Snake vs. Striped Whipsnake
• Mountain Patch-nosed Snake vs. Western Patch-nosed Snake
• Mountain Skink vs. Great Plains Skink
• Mud Salamander vs. Cave Salamander
• Mud Salamander vs. Long-tailed Salamander
• Mud Salamander vs. Red Salamander
• Mud Salamander vs. Spring Salamander
• Mudsnake vs. Plain-bellied Watersnake
• Narrowhead Garter Snake vs. Black-necked Garter Snake
• Narrowhead Garter Snake vs. Checkered Garter Snake
• Narrowhead Garter Snake vs. Mexican Garter Snake
• Narrowhead Garter Snake vs. Western Terrestrial Garter Snake
• Neuse River Waterdog vs. Dwarf Waterdog
• New Jersey Chorus Frog vs. Spring Peeper
• New Mexico Whiptail vs. Chihuahuan Spotted Whiptail
• New Mexico Whiptail vs. Desert Grassland Whiptail
• New Mexico Whiptail vs. Plateau Striped Whiptail
• Nicaraguan Slider vs. Peninsular Cooter
• Nicaraguan Slider vs. Pond Slider
• North American Racer vs. Central Ratsnake
• Northern Alligator Lizard vs. Western Skink
• Northern Cat-eyed Snake vs. Chihuahuan Nightsnake
• Northern Cottonmouth vs. Common Watersnake
• Northern Cottonmouth vs. Diamondback Watersnake
• Northern Cottonmouth vs. Eastern Copperhead
• Northern Cottonmouth vs. Mississippi Green Watersnake
• Northern Cottonmouth vs. Plain-bellied Watersnake
• Northern Cricket Frog vs. Blanchard's Cricket Frog
• Northern Curly-tailed Lizard vs. Eastern Fence Lizard
• Northern Curly-tailed Lizard vs. Florida Scrub Lizard
• Northern Curly-tailed Lizard vs. Peters's Rock Agama
• Northern Dusky Salamander vs. Eastern Red-backed Salamander
• Northern Dwarf Siren vs. Greater Siren
• Northern Dwarf Siren vs. Lesser Siren
• Northern Dwarf Siren vs. Two-toed Amphiuma
• Northern Gray-cheeked Salamander vs. Eastern Red-backed Salamander
• Northern Gray-cheeked Salamander vs. Northern Slimy Salamander
• Northern Gray-cheeked Salamander vs. White-spotted Slimy Salamander
• Northern Grotto Salamander vs. Cave Salamander
• Northern Grotto Salamander vs. Dark-sided Salamander
• Northern Legless Lizard vs. San Diegan Legless Lizard
• Northern Leopard Frog vs. American Bullfrog
• Northern Leopard Frog vs. Plains Leopard Frog
• Northern Map Turtle vs. Blanding's Turtle
• Northern Map Turtle vs. Northern Red-bellied Cooter
• Northern Map Turtle vs. Ouachita Map Turtle
• Northern Map Turtle vs. Spotted Turtle
• Northern Pinesnake vs. Central Ratsnake
• Northern Pinesnake vs. Prairie Kingsnake
• Northern Pygmy Salamander vs. Eastern Red-backed Salamander
• Northern Ravine Salamander vs. Eastern Red-backed Salamander
• Northern Ravine Salamander vs. Northern Dusky Salamander
• Northern Ravine Salamander vs. Northern Slimy Salamander
• Northern Red-legged Frog vs. American Bullfrog
• Northern Red-legged Frog vs. Columbia Spotted Frog
• Northern Rose-bellied Lizard vs. Prairie Lizard
• Northern Shovel-nosed Salamander vs. Seal Salamander
• Northern Slimy Salamander vs. Mole Salamander
• Northern Slimy Salamander vs. Small-mouthed Salamander
• Northern Two-lined Salamander vs. Long-tailed Salamander
• Northern Two-lined Salamander vs. Northern Dusky Salamander
• Northern Two-lined Salamander vs. Southern Two-lined Salamander
• Northern Zigzag Salamander vs. Four-toed Salamander
• Northern Zigzag Salamander vs. Northern Dusky Salamander
• Northern Zigzag Salamander vs. Northern Ravine Salamander
• Northwestern Garter Snake vs. Common Garter Snake
• Northwestern Garter Snake vs. Western Terrestrial Garter Snake
• Northwestern Pond Turtle vs. Painted Turtle
• Northwestern Pond Turtle vs. Pond Slider
• Northwestern Salamander vs. Ensatina
• Northwestern Salamander vs. Pacific Giant Salamander
• Oak Toad vs. Fowler's Toad
• Oak Toad vs. Gulf Coast Toad
• Ocellated Bronze Skink vs. Great Plains Skink
• Ocellated Gecko vs. Ashy Gecko
• Ocellated Gecko vs. Reef Gecko
• Ocmulgee Slimy Salamander vs. Mole Salamander
• Ocoee Salamander vs. Cumberland Dusky Salamander
• Ocoee Salamander vs. Red-legged Salamander
• Ocoee Salamander vs. Santeetlah Dusky Salamander
• Ocoee Salamander vs. Seal Salamander
• Ocoee Salamander vs. Seepage Salamander
• Ocoee Salamander vs. Spotted Dusky Salamander
• Oklahoma Salamander vs. Western Grotto Salamander
• Olive Ridley Sea Turtle vs. Green Sea Turtle
• Olive Ridley Sea Turtle vs. Loggerhead Sea Turtle
• Olympic Torrent Salamander vs. Ensatina
• Olympic Torrent Salamander vs. Long-toed Salamander
• Olympic Torrent Salamander vs. Rough-skinned Newt
• Olympic Torrent Salamander vs. Van Dyke's Salamander
• Olympic Torrent Salamander vs. Western Red-backed Salamander
• One-toed Amphiuma vs. Greater Siren
• One-toed Amphiuma vs. Gulf Coast Waterdog
• One-toed Amphiuma vs. Lesser Siren
• One-toed Amphiuma vs. Three-toed Amphiuma
• One-toed Amphiuma vs. Two-toed Amphiuma
• One-toed Amphiuma vs. Western Lesser Siren
• Orange-throated Whiptail vs. Common Side-blotched Lizard
• Orange-throated Whiptail vs. Gilbert's Skink
• Orange-throated Whiptail vs. Western Skink
• Orange-throated Whiptail vs. Western Whiptail
• Oregon Slender Salamander vs. California Slender Salamander
• Oregon Slender Salamander vs. Dunn's Salamander
• Oregon Slender Salamander vs. Western Red-backed Salamander
• Oregon Spotted Frog vs. Cascades Frog
• Oregon Spotted Frog vs. Columbia Spotted Frog
• Oregon Spotted Frog vs. Foothill Yellow-legged Frog
• Oregon Spotted Frog vs. Northern Red-legged Frog
• Ornate Box Turtle vs. Blanding's Turtle
• Ornate Box Turtle vs. Common Box Turtle
• Ornate Box Turtle vs. False Map Turtle
• Ornate Box Turtle vs. Northern Map Turtle
• Ornate Box Turtle vs. Ouachita Map Turtle
• Ornate Box Turtle vs. River Cooter
• Ornate Box Turtle vs. Spotted Turtle
• Ornate Chorus Frog vs. Southern Chorus Frog
• Ornate Chorus Frog vs. Spring Peeper
• Ornate Chorus Frog vs. Upland Chorus Frog
• Ornate Tree Lizard vs. Common Sagebrush Lizard
• Ornate Tree Lizard vs. Plateau Fence Lizard
• Ornate Tree Lizard vs. Prairie Lizard
• Ornate Tree Lizard vs. Southern Sagebrush Lizard
• Ornate Tree Lizard vs. Western Earless Lizard
• Ornate Tree Lizard vs. Western Fence Lizard
• Ouachita Dusky Salamander vs. Many-ribbed Salamander
• Ouachita Streambed Salamander vs. Many-ribbed Salamander
• Oustalet's Chameleon vs. Veiled Chameleon
• Ozark Zigzag Salamander vs. Dark-sided Salamander
• Pacific Chorus Frog vs. Boreal Chorus Frog
• Pacific Chorus Frog vs. Rocky Mountain Tailed Frog
• Painted Turtle vs. Blanding's Turtle
• Painted Turtle vs. Common Box Turtle
• Painted Turtle vs. False Map Turtle
• Painted Turtle vs. Northern Map Turtle
• Painted Turtle vs. Northern Red-bellied Cooter
• Painted Turtle vs. Ornate Box Turtle
• Painted Turtle vs. Ouachita Map Turtle
• Painted Turtle vs. Pond Slider
• Painted Turtle vs. River Cooter
• Painted Turtle vs. Spotted Turtle
• Panamint Alligator Lizard vs. Northern Alligator Lizard
• Panamint Alligator Lizard vs. Southern Alligator Lizard
• Panamint Rattlesnake vs. Coast Night Snake
• Panamint Rattlesnake vs. Desert Nightsnake
• Panamint Rattlesnake vs. Gopher Snake
• Panamint Rattlesnake vs. Mojave Rattlesnake
• Panamint Rattlesnake vs. Sidewinder
• Panamint Rattlesnake vs. Southwestern Speckled Rattlesnake
• Panamint Rattlesnake vs. Western Diamond-backed Rattlesnake
• Panamint Rattlesnake vs. Western Rattlesnake
• Panther Chameleon vs. Veiled Chameleon
• Pascagoula Dusky Salamander vs. Spotted Dusky Salamander
• Pascagoula Dusky Salamander vs. Valentine's Southern Dusky Salamander
• Patch-nosed Salamander vs. Blue Ridge Two-lined Salamander
• Patch-nosed Salamander vs. Seepage Salamander
• Patch-nosed Salamander vs. Southern Two-lined Salamander
• Peaks of Otter Salamander vs. Eastern Red-backed Salamander
• Peaks of Otter Salamander vs. White-spotted Slimy Salamander
• Peninsular Cooter vs. Coastal Plain Cooter
• Peninsular Cooter vs. Florida Red-bellied Cooter
• Peninsular Cooter vs. Pond Slider
• Peninsular Cooter vs. River Cooter
• Peninsular Leaf-toed Gecko vs. Desert Night Lizard
• Peninsular Leaf-toed Gecko vs. Mediterranean Gecko
• Peninsular Leaf-toed Gecko vs. Western Banded Gecko
• Peters's Rock Agama vs. Black Spiny-tailed Iguana
• Pickerel Frog vs. Northern Leopard Frog
• Piedmont Dusky Salamander vs. Wolf Dusky Salamander
• Pig Frog vs. American Bullfrog
• Pig Frog vs. Green Frog
• Pigeon Mountain Salamander vs. Green Salamander
• Pigeon Mountain Salamander vs. Northern Slimy Salamander
• Pine Barrens Treefrog vs. Cope's Gray Tree Frog
• Pine Barrens Treefrog vs. Gray Treefrog
• Pine Barrens Treefrog vs. Green Treefrog
• Pine Woods Littersnake vs. DeKay's Brownsnake
• Pine Woods Littersnake vs. Red-bellied Snake
• Pine Woods Littersnake vs. Rough Earthsnake
• Pine Woods Littersnake vs. Smooth Earthsnake
• Pine Woods Treefrog vs. Bird-voiced Treefrog
• Pine Woods Treefrog vs. Cope's Gray Tree Frog
• Pine Woods Treefrog vs. Squirrel Treefrog
• Plain-bellied Watersnake vs. Diamondback Watersnake
• Plains Black-headed Snake vs. Flat-headed Snake
• Plains Hognose Snake vs. Eastern Hognose Snake
• Plains Leopard Frog vs. Pickerel Frog
• Plains Spadefoot vs. Great Plains Toad
• Plains Spadefoot vs. Woodhouse's Toad
• Plateau Earless Lizard vs. Greater Earless Lizard
• Plateau Earless Lizard vs. Southern Earless Lizard
• Plateau Earless Lizard vs. Western Earless Lizard
• Plateau Fence Lizard vs. Common Sagebrush Lizard
• Plateau Fence Lizard vs. Greater Short-horned Lizard
• Plateau Fence Lizard vs. Prairie Lizard
• Plateau Fence Lizard vs. Western Earless Lizard
• Plateau Striped Whiptail vs. Common Sagebrush Lizard
• Plateau Striped Whiptail vs. Common Side-blotched Lizard
• Plateau Striped Whiptail vs. Desert Collared Lizard
• Plateau Striped Whiptail vs. Desert Horned Lizard
• Plateau Striped Whiptail vs. Greater Short-horned Lizard
• Plateau Striped Whiptail vs. Long-nosed Leopard Lizard
• Plateau Striped Whiptail vs. Ornate Tree Lizard
• Plateau Striped Whiptail vs. Plateau Fence Lizard
• Plateau Striped Whiptail vs. Prairie Lizard
• Plateau Striped Whiptail vs. Six-lined Racerunner
• Plateau Striped Whiptail vs. Western Earless Lizard
• Plateau Striped Whiptail vs. Western Fence Lizard
• Plateau Striped Whiptail vs. Western Whiptail
• Pond Slider vs. Blanding's Turtle
• Pond Slider vs. Common Box Turtle
• Pond Slider vs. False Map Turtle
• Pond Slider vs. Northern Map Turtle
• Pond Slider vs. Northern Red-bellied Cooter
• Pond Slider vs. Ornate Box Turtle
• Pond Slider vs. Ouachita Map Turtle
• Pond Slider vs. River Cooter
• Pond Slider vs. Spotted Turtle
• Prairie Kingsnake vs. Central Ratsnake
• Prairie Kingsnake vs. Gopher Snake
• Prairie Lizard vs. Eastern Fence Lizard
• Prairie Rattlesnake vs. Gopher Snake
• Prairie Rattlesnake vs. Mojave Rattlesnake
• Prairie Rattlesnake vs. Western Diamond-backed Rattlesnake
• Prairie Skink vs. Broad-headed Skink
• Prairie Skink vs. Coal Skink
• Prairie Skink vs. Common Five-lined Skink
• Prairie Skink vs. Little Brown Skink
• Pygmy Rattlesnake vs. Prairie Rattlesnake
• Pygmy Rattlesnake vs. Timber Rattlesnake
• Pygmy Rattlesnake vs. Western Diamond-backed Rattlesnake
• Pygmy Rattlesnake vs. Western Massasauga
• Pygmy Salamander vs. Seepage Salamander
• Pygmy Salamander vs. Southern Red-backed Salamander
• Pygmy Short-horned Lizard vs. Blainville's Horned Lizard
• Pygmy Short-horned Lizard vs. Common Sagebrush Lizard
• Pygmy Short-horned Lizard vs. Greater Short-horned Lizard
• Pygmy Short-horned Lizard vs. Northern Alligator Lizard
• Queensnake vs. Common Watersnake
• Railroad Valley Toad vs. Great Basin Spadefoot
• Railroad Valley Toad vs. Western Toad
• Rainbow Snake vs. Mudsnake
• Rainbow Whiptail vs. Giant Whiptail
• Rainbow Whiptail vs. Six-lined Racerunner
• Ravine Salamander vs. Allegheny Mountain Dusky Salamander
• Ravine Salamander vs. Cumberland Plateau Salamander
• Ravine Salamander vs. Eastern Red-backed Salamander
• Ravine Salamander vs. Four-toed Salamander
• Ravine Salamander vs. Northern Dusky Salamander
• Ravine Salamander vs. Northern Slimy Salamander
• Ravine Salamander vs. Northern Zigzag Salamander
• Ravine Salamander vs. Southern Zigzag Salamander
• Ravine Salamander vs. Wehrle's Salamander
• Razor-backed Musk Turtle vs. Eastern Musk Turtle
• Red Cornsnake vs. Central Ratsnake
• Red Diamond Rattlesnake vs. Southwestern Speckled Rattlesnake
• Red Diamond Rattlesnake vs. Western Rattlesnake
• Red Hills Salamander vs. Southeastern Slimy Salamander
• Red Hills Salamander vs. Spotted Dusky Salamander
• Red River Mudpuppy vs. Common Mudpuppy
• Red River Mudpuppy vs. Eastern Tiger Salamander
• Red River Mudpuppy vs. Hellbender
• Red River Mudpuppy vs. Western Lesser Siren
• Red Salamander vs. Cave Salamander
• Red Salamander vs. Long-tailed Salamander
• Red-backed Whiptail vs. Giant Spotted Whiptail
• Red-backed Whiptail vs. Western Whiptail
• Red-banded Butterfly Lizard vs. Common Butterfly Lizard
• Red-banded Butterfly Lizard vs. Giant Ameiva
• Red-banded Butterfly Lizard vs. Six-lined Racerunner
• Red-bellied Newt vs. California Newt
• Red-bellied Newt vs. Rough-skinned Newt
• Red-bellied Newt vs. Sierra Newt
• Red-bellied Short-necked Turtle vs. Florida Red-bellied Cooter
• Red-bellied Short-necked Turtle vs. Pond Slider
• Red-bellied Snake vs. DeKay's Brownsnake
• Red-cheeked Salamander vs. Northern Slimy Salamander
• Red-cheeked Salamander vs. Southern Appalachian Salamander
• Red-legged Salamander vs. Southern Appalachian Salamander
• Red-spotted Toad vs. Great Plains Toad
• Red-spotted Toad vs. Western Spadefoot
• Red-spotted Toad vs. Western Toad
• Red-spotted Toad vs. Woodhouse's Toad
• Reef Gecko vs. Ashy Gecko
• Reef Gecko vs. Mediterranean Gecko
• Regal Horned Lizard vs. Desert Horned Lizard
• Regal Horned Lizard vs. Greater Short-horned Lizard
• Relict Leopard Frog vs. Northern Leopard Frog
• Relictual Slender Salamander vs. Black-bellied Slender Salamander
• Relictual Slender Salamander vs. Greenhorn Mountains Slender Salamander
• Relictual Slender Salamander vs. Gregarious Slender Salamander
• Relictual Slender Salamander vs. Kern Canyon Slender Salamander
• Relictual Slender Salamander vs. Tehachapi Slender Salamander
• Reticulate Collared Lizard vs. Eastern Collared Lizard
• Reticulated Flatwoods Salamander vs. Marbled Salamander
• Reticulated Flatwoods Salamander vs. Mole Salamander
• Reticulated Gecko vs. Texas Banded Gecko
• Reticulated Siren vs. Escambia Waterdog
• Reticulated Siren vs. Greater Siren
• Reticulated Siren vs. Lesser Siren
• Reticulated Siren vs. One-toed Amphiuma
• Reticulated Siren vs. Two-toed Amphiuma
• Rich Mountain Salamander vs. Kiamichi Slimy Salamander
• Rich Mountain Salamander vs. Western Slimy Salamander
• Ridge-nosed Rattlesnake vs. Arizona Black Rattlesnake
• Ridge-nosed Rattlesnake vs. Desert Nightsnake
• Ridge-nosed Rattlesnake vs. Gopher Snake
• Ridge-nosed Rattlesnake vs. Mojave Rattlesnake
• Ridge-nosed Rattlesnake vs. Prairie Rattlesnake
• Ridge-nosed Rattlesnake vs. Rock Rattlesnake
• Ridge-nosed Rattlesnake vs. Sidewinder
• Ridge-nosed Rattlesnake vs. Sonoran Lyre Snake
• Ridge-nosed Rattlesnake vs. Southwestern Speckled Rattlesnake
• Ridge-nosed Rattlesnake vs. Tiger Rattlesnake
• Ridge-nosed Rattlesnake vs. Twin-spotted Rattlesnake
• Ridge-nosed Rattlesnake vs. Western Black-tailed Rattlesnake
• Ridge-nosed Rattlesnake vs. Western Diamond-backed Rattlesnake
• Rim Rock Crowned Snake vs. Brahminy Blindsnake
• Rim Rock Crowned Snake vs. Florida Brownsnake
• Rim Rock Crowned Snake vs. Ring-necked Snake
• Ring-necked Snake vs. DeKay's Brownsnake
• Ring-necked Snake vs. Red-bellied Snake
• Ring-necked Snake vs. Smooth Earthsnake
• Ringed Map Turtle vs. Pearl River Map Turtle
• Ringed Salamander vs. Marbled Salamander
• Ringed Salamander vs. Spotted Salamander
• Ringed Wall Gecko vs. Asian House Gecko
• Ringed Wall Gecko vs. Flat-tailed House Gecko
• Ringed Wall Gecko vs. Indo-Pacific House Gecko
• Ringed Wall Gecko vs. Keeled Rock Gecko
• Ringed Wall Gecko vs. Mediterranean Gecko
• Ringed Wall Gecko vs. Moorish Gecko
• Ringed Wall Gecko vs. Tropical House Gecko
• Rio Grande Chirping Frog vs. Greenhouse Frog
• Rio Grande Cooter vs. Pond Slider
• Rio Grande Cooter vs. River Cooter
• Rio Grande Leopard Frog vs. California Red-legged Frog
• Rio Grande Leopard Frog vs. Crawfish Frog
• Rio Grande Leopard Frog vs. Plains Leopard Frog
• Rio Grande Leopard Frog vs. Southern Leopard Frog
• River Cooter vs. Blanding's Turtle
• River Cooter vs. False Map Turtle
• River Cooter vs. Northern Map Turtle
• River Cooter vs. Northwestern Pond Turtle
• River Cooter vs. Ouachita Map Turtle
• River Cooter vs. Southwestern Pond Turtle
• River Cooter vs. Spotted Turtle
• River Frog vs. American Bullfrog
• River Frog vs. Gopher Frog
• River Frog vs. Green Frog
• River Frog vs. Pig Frog
• Rock Rattlesnake vs. Arizona Black Rattlesnake
• Rock Rattlesnake vs. Desert Nightsnake
• Rock Rattlesnake vs. Gopher Snake
• Rock Rattlesnake vs. Mojave Rattlesnake
• Rock Rattlesnake vs. Prairie Rattlesnake
• Rock Rattlesnake vs. Sidewinder
• Rock Rattlesnake vs. Sonoran Lyre Snake
• Rock Rattlesnake vs. Southwestern Speckled Rattlesnake
• Rock Rattlesnake vs. Western Diamond-backed Rattlesnake
• Rock Rattlesnake vs. Western Massasauga
• Rough Earthsnake vs. Common Wormsnake
• Rough Earthsnake vs. DeKay's Brownsnake
• Rough Earthsnake vs. Flat-headed Snake
• Rough Earthsnake vs. Great Plains Ground Snake
• Rough Earthsnake vs. Red-bellied Snake
• Rough Earthsnake vs. Ring-necked Snake
• Rough Earthsnake vs. Smooth Earthsnake
• Rough Earthsnake vs. Western Wormsnake
• Rough Greensnake vs. Smooth Greensnake
• Rough-skinned Newt vs. Northwestern Salamander
• Roundtail Horned Lizard vs. Desert Horned Lizard
• Roundtail Horned Lizard vs. Greater Short-horned Lizard
• Roundtail Horned Lizard vs. Regal Horned Lizard
• Rubber Eel vs. Greater Siren
• Rubber Eel vs. Two-toed Amphiuma
• Rusty-rumped Whiptail vs. Chihuahuan Spotted Whiptail
• Rusty-rumped Whiptail vs. Common Checkered Whiptail
• Rusty-rumped Whiptail vs. Common Spotted Whiptail
• Sabine Map Turtle vs. False Map Turtle
• Sacramento Mountain Salamander vs. Western Tiger Salamander
• Saddled Leafnose Snake vs. Ground Snake
• Saddled Leafnose Snake vs. Western Leaf-nosed Snake
• Saltmarsh Snake vs. Banded Watersnake
• Saltmarsh Snake vs. Diamondback Watersnake
• Saltmarsh Snake vs. Graham's Crawfish Snake
• Saltmarsh Snake vs. Mississippi Green Watersnake
• Saltmarsh Snake vs. Plain-bellied Watersnake
• Samwel Shasta Salamander vs. Ensatina
• Samwel Shasta Salamander vs. Shasta Black Salamander
• San Gabriel Slender Salamander vs. Black-bellied Slender Salamander
• San Gabriel Slender Salamander vs. Southern California Slender Salamander
• San Marcos Salamander vs. Texas Blind Salamander
• San Simeon Slender Salamander vs. Black-bellied Slender Salamander
• San Simeon Slender Salamander vs. Gabilan Mountains Slender Salamander
• San Simeon Slender Salamander vs. Lesser Slender Salamander
• San Simeon Slender Salamander vs. Santa Lucia Mountains Slender Salamander
• Sandstone Night Lizard vs. Desert Night Lizard
• Sandstone Night Lizard vs. Granite Night Lizard
• Sandstone Night Lizard vs. Peninsular Leaf-toed Gecko
• Sandstone Night Lizard vs. Western Banded Gecko
• Santa Cruz Black Salamander vs. Arboreal Salamander
• Santa Lucia Mountains Slender Salamander vs. Black-bellied Slender Salamander
• Santa Lucia Mountains Slender Salamander vs. California Slender Salamander
• Santeetlah Dusky Salamander vs. Seal Salamander
• Santeetlah Dusky Salamander vs. Spotted Dusky Salamander
• Savannah Dusky Salamander vs. Seal Salamander
• Savannah Slimy Salamander vs. Mole Salamander
• Scarlet Kingsnake vs. Eastern Milksnake
• Scarlet Kingsnake vs. Scarletsnake
• Scarletsnake vs. Eastern Milksnake
• Schott's Whipsnake vs. Common Coachwhip
• Schott's Whipsnake vs. Striped Whipsnake
• Schott's Whipsnake vs. Texas Patch-nosed Snake
• Scott Bar Salamander vs. Clouded Salamander
• Scott Bar Salamander vs. Del Norte Salamander
• Scott Bar Salamander vs. Dunn's Salamander
• Scott Bar Salamander vs. Ensatina
• Scott Bar Salamander vs. Klamath Black Salamander
• Scott Bar Salamander vs. Wandering Salamander
• Seal Salamander vs. Allegheny Mountain Dusky Salamander
• Seal Salamander vs. Northern Dusky Salamander
• Seepage Salamander vs. Southern Red-backed Salamander
• Seepage Siren vs. Escambia Waterdog
• Seepage Siren vs. Lesser Siren
• Seepage Siren vs. One-toed Amphiuma
• Seepage Siren vs. Reticulated Siren
• Seepage Siren vs. Two-toed Amphiuma
• Sequoia Slender Salamander vs. Greenhorn Mountains Slender Salamander
• Sequoia Slender Salamander vs. Gregarious Slender Salamander
• Sequoia Slender Salamander vs. Kern Plateau Slender Salamander
• Sequoia Slender Salamander vs. Kings River Slender Salamander
• Sequoia Slender Salamander vs. Mount Lyell Salamander
• Sequoia Slender Salamander vs. Relictual Slender Salamander
• Shasta Black Salamander vs. Ensatina
• Shasta Black Salamander vs. Klamath Black Salamander
• Shasta Salamander vs. Ensatina
• Shasta Salamander vs. Shasta Black Salamander
• Sheep Frog vs. Eastern Narrow-mouthed Toad
• Sheep Frog vs. Western Narrow-mouthed Toad
• Shenandoah Mountain Salamander vs. Northern Dusky Salamander
• Shenandoah Salamander vs. Eastern Red-backed Salamander
• Shenandoah Salamander vs. White-spotted Slimy Salamander
• Short-headed Garter Snake vs. Common Garter Snake
• Short-headed Garter Snake vs. Common Ribbon Snake
• Short-tailed Snake vs. Pygmy Rattlesnake
• Sidewinder vs. Sonoran Lyre Snake
• Sidewinder vs. Southwestern Speckled Rattlesnake
• Sidewinder vs. Western Rattlesnake
• Sierra Garter Snake vs. Aquatic Garter Snake
• Sierra Garter Snake vs. Common Garter Snake
• Sierra Garter Snake vs. Two-striped Garter Snake
• Sierra Garter Snake vs. Western Terrestrial Garter Snake
• Sierra Nevada Yellow-legged Frog vs. American Bullfrog
• Sierra Nevada Yellow-legged Frog vs. California Red-legged Frog
• Sierra Nevada Yellow-legged Frog vs. Cascades Frog
• Sierra Nevada Yellow-legged Frog vs. Foothill Yellow-legged Frog
• Sierra Newt vs. Rough-skinned Newt
• Sierra Night Lizard vs. Desert Night Lizard
• Sierra Night Lizard vs. Mediterranean Gecko
• Sierra Night Lizard vs. Western Banded Gecko
• Siskiyou Mountains Salamander vs. Clouded Salamander
• Siskiyou Mountains Salamander vs. Dunn's Salamander
• Siskiyou Mountains Salamander vs. Ensatina
• Siskiyou Mountains Salamander vs. Klamath Black Salamander
• Siskiyou Mountains Salamander vs. Wandering Salamander
• Slender Glass Lizard vs. Common Garter Snake
• Slevin's Bunch Grass Lizard vs. Southwestern Fence Lizard
• Slevin's Bunch Grass Lizard vs. Striped Plateau Lizard
• Slowinski's Cornsnake vs. Prairie Kingsnake
• Slowinski's Cornsnake vs. Western Ratsnake
• Small-mouthed Salamander vs. Jefferson Salamander
• Small-mouthed Salamander vs. Streamside Salamander
• Smooth Softshell vs. Blanding's Turtle
• Smooth Softshell vs. Common Box Turtle
• Smooth Softshell vs. Common Snapping Turtle
• Smooth Softshell vs. Eastern Musk Turtle
• Smooth Softshell vs. False Map Turtle
• Smooth Softshell vs. Northern Map Turtle
• Smooth Softshell vs. Ornate Box Turtle
• Smooth Softshell vs. Ouachita Map Turtle
• Smooth Softshell vs. Painted Turtle
• Smooth Softshell vs. Pond Slider
• Smooth Softshell vs. River Cooter
• Smooth Softshell vs. Spotted Turtle
• Sonoran Collared Lizard vs. Desert Collared Lizard
• Sonoran Collared Lizard vs. Eastern Collared Lizard
• Sonoran Collared Lizard vs. Long-nosed Leopard Lizard
• Sonoran Coralsnake vs. Colorado Desert Shovelnose Snake
• Sonoran Coralsnake vs. Ground Snake
• Sonoran Coralsnake vs. Long-nosed Snake
• Sonoran Coralsnake vs. Sonoran Shovel-nosed Snake
• Sonoran Desert Toad vs. American Bullfrog
• Sonoran Desert Toad vs. Couch's Spadefoot
• Sonoran Desert Toad vs. Great Plains Toad
• Sonoran Desert Toad vs. Red-spotted Toad
• Sonoran Desert Toad vs. Woodhouse's Toad
• Sonoran Desert Tortoise vs. Mojave Desert Tortoise
• Sonoran Green Toad vs. Chihuahuan Green Toad
• Sonoran Green Toad vs. Couch's Spadefoot
• Sonoran Green Toad vs. Great Plains Toad
• Sonoran Horned Lizard vs. Desert Horned Lizard
• Sonoran Horned Lizard vs. Flat-tailed Horned Lizard
• Sonoran Horned Lizard vs. Regal Horned Lizard
• Sonoran Lyre Snake vs. Desert Nightsnake
• Sonoran Lyre Snake vs. Gopher Snake
• Sonoran Mud Turtle vs. Yellow Mud Turtle
• Sonoran Shovel-nosed Snake vs. Banded Sand Snake
• Sonoran Shovel-nosed Snake vs. Colorado Desert Shovelnose Snake
• Sonoran Spotted Whiptail vs. Gilbert's Skink
• Sonoran Spotted Whiptail vs. Orange-throated Whiptail
• Sonoran Spotted Whiptail vs. Western Skink
• Sonoran Spotted Whiptail vs. Western Whiptail
• Sonoran Whipsnake vs. Common Coachwhip
• Sonoran Whipsnake vs. Striped Whipsnake
• Sonoran Whipsnake vs. Western Patch-nosed Snake
• South Carolina Slimy Salamander vs. Mabee's Salamander
• South Carolina Slimy Salamander vs. Mole Salamander
• South Florida Mole Kingsnake vs. Red Cornsnake
• South Mountain Gray-cheeked Salamander vs. White-spotted Slimy Salamander
• Southeastern Crowned Snake vs. Common Wormsnake
• Southeastern Crowned Snake vs. DeKay's Brownsnake
• Southeastern Crowned Snake vs. Red-bellied Snake
• Southeastern Crowned Snake vs. Ring-necked Snake
• Southeastern Crowned Snake vs. Rough Earthsnake
• Southeastern Crowned Snake vs. Smooth Earthsnake
• Southeastern Five-lined Skink vs. Broad-headed Skink
• Southeastern Five-lined Skink vs. Common Five-lined Skink
• Southern Alligator Lizard vs. Common Sagebrush Lizard
• Southern Alligator Lizard vs. Common Side-blotched Lizard
• Southern Alligator Lizard vs. Northern Alligator Lizard
• Southern Alligator Lizard vs. Pygmy Short-horned Lizard
• Southern Alligator Lizard vs. Western Fence Lizard
• Southern Alligator Lizard vs. Western Skink
• Southern Alligator Lizard vs. Western Whiptail
• Southern Appalachian Salamander vs. Northern Slimy Salamander
• Southern Appalachian Salamander vs. Tellico Salamander
• Southern Appalachian Salamander vs. White-spotted Slimy Salamander
• Southern Blackbelly Salamander vs. Central Shovel-nosed Dusky Salamander
• Southern Blackbelly Salamander vs. Seal Salamander
• Southern Blackbelly Salamander vs. Southern Shovel-nosed Dusky Salamander
• Southern Blackbelly Salamander vs. Spotted Dusky Salamander
• Southern Chorus Frog vs. Brimley's Chorus Frog
• Southern Chorus Frog vs. Little Grass Frog
• Southern Chorus Frog vs. Upland Chorus Frog
• Southern Cricket Frog vs. Blanchard's Cricket Frog
• Southern Cricket Frog vs. Cajun Chorus Frog
• Southern Cricket Frog vs. Northern Cricket Frog
• Southern Dwarf Siren vs. Greater Siren
• Southern Dwarf Siren vs. Lesser Siren
• Southern Dwarf Siren vs. Two-toed Amphiuma
• Southern Earless Lizard vs. Greater Earless Lizard
• Southern Earless Lizard vs. Keeled Earless Lizard
• Southern Gray-cheeked Salamander vs. Red-cheeked Salamander
• Southern Gray-cheeked Salamander vs. Southern Appalachian Salamander
• Southern Gray-cheeked Salamander vs. White-spotted Slimy Salamander
• Southern Grotto Salamander vs. Cave Salamander
• Southern Grotto Salamander vs. Dark-sided Salamander
• Southern Grotto Salamander vs. Oklahoma Salamander
• Southern Hognose Snake vs. Eastern Hognose Snake
• Southern Hognose Snake vs. Pygmy Rattlesnake
• Southern Leopard Frog vs. American Bullfrog
• Southern Leopard Frog vs. Northern Leopard Frog
• Southern Leopard Frog vs. Pickerel Frog
• Southern Leopard Frog vs. Plains Leopard Frog
• Southern Mountain Yellow-legged Frog vs. California Red-legged Frog
• Southern Mountain Yellow-legged Frog vs. Foothill Yellow-legged Frog
• Southern Mountain Yellow-legged Frog vs. Sierra Nevada Yellow-legged Frog
• Southern Painted Turtle vs. Painted Turtle
• Southern Painted Turtle vs. Pond Slider
• Southern Red-backed Salamander vs. Four-toed Salamander
• Southern Red-backed Salamander vs. Ozark Zigzag Salamander
• Southern Red-backed Salamander vs. Spotted Dusky Salamander
• Southern Rubber Boa vs. Coastal Rosy Boa
• Southern Rubber Boa vs. Northern Rubber Boa
• Southern Sagebrush Lizard vs. Common Sagebrush Lizard
• Southern Sagebrush Lizard vs. Common Side-blotched Lizard
• Southern Sagebrush Lizard vs. Western Fence Lizard
• Southern Shovel-nosed Dusky Salamander vs. Seal Salamander
• Southern Toad vs. American Toad
• Southern Toad vs. Fowler's Toad
• Southern Toad vs. Gulf Coast Toad
• Southern Toad vs. Oak Toad
• Southern Torrent Salamander vs. Cascade Torrent Salamander
• Southern Torrent Salamander vs. Dunn's Salamander
• Southern Torrent Salamander vs. Western Red-backed Salamander
• Southern Two-lined Salamander vs. Northern Dusky Salamander
• Southern Zigzag Salamander vs. Eastern Red-backed Salamander
• Southern Zigzag Salamander vs. Four-toed Salamander
• Southern Zigzag Salamander vs. Northern Dusky Salamander
• Southern Zigzag Salamander vs. Southern Red-backed Salamander
• Southern Zigzag Salamander vs. Spotted Dusky Salamander
• Southwestern Blackhead Snake vs. Common Sharp-tailed Snake
• Southwestern Blackhead Snake vs. Flat-headed Snake
• Southwestern Blackhead Snake vs. Ground Snake
• Southwestern Blackhead Snake vs. Plains Black-headed Snake
• Southwestern Blackhead Snake vs. Ring-necked Snake
• Southwestern Blackhead Snake vs. Western Black-headed Snake
• Southwestern Fence Lizard vs. Common Side-blotched Lizard
• Southwestern Fence Lizard vs. Ornate Tree Lizard
• Southwestern Fence Lizard vs. Plateau Fence Lizard
• Southwestern Fence Lizard vs. Striped Plateau Lizard
• Southwestern Pond Turtle vs. Northwestern Pond Turtle
• Southwestern Pond Turtle vs. Painted Turtle
• Southwestern Pond Turtle vs. Pond Slider
• Southwestern Speckled Rattlesnake vs. Sonoran Lyre Snake
• Southwestern Speckled Rattlesnake vs. Western Rattlesnake
• Speckled Black Salamander vs. Arboreal Salamander
• Speckled Black Salamander vs. Del Norte Salamander
• Speckled Kingsnake vs. Black Kingsnake
• Speckled Racer vs. Desert Kingsnake
• Spectacled Caiman vs. American Alligator
• Spectacled Caiman vs. American Crocodile
• Spiny Softshell vs. Blanding's Turtle
• Spiny Softshell vs. Common Box Turtle
• Spiny Softshell vs. Common Snapping Turtle
• Spiny Softshell vs. Eastern Musk Turtle
• Spiny Softshell vs. False Map Turtle
• Spiny Softshell vs. Northern Map Turtle
• Spiny Softshell vs. Ornate Box Turtle
• Spiny Softshell vs. Ouachita Map Turtle
• Spiny Softshell vs. Painted Turtle
• Spiny Softshell vs. Pond Slider
• Spiny Softshell vs. River Cooter
• Spiny Softshell vs. Smooth Softshell
• Spiny Softshell vs. Spotted Turtle
• Spiny-tailed Iguana vs. Common Chuckwalla
• Spiny-tailed Iguana vs. Desert Iguana
• Spotted Chorus Frog vs. Boreal Chorus Frog
• Spotted Dusky Salamander vs. Eastern Red-backed Salamander
• Spotted Dusky Salamander vs. Four-toed Salamander
• Spotted Dusky Salamander vs. Northern Dusky Salamander
• Spotted Dusky Salamander vs. Northern Zigzag Salamander
• Spotted Dusky Salamander vs. Southern Two-lined Salamander
• Spotted House Gecko vs. Asian House Gecko
• Spotted House Gecko vs. Mediterranean Gecko
• Spotted House Gecko vs. Tropical House Gecko
• Spotted Salamander vs. Eastern Tiger Salamander
• Spotted Turtle vs. Ouachita Map Turtle
• Spring Peeper vs. Boreal Chorus Frog
• Spring Peeper vs. Western Chorus Frog
• Spring Salamander vs. Allegheny Mountain Dusky Salamander
• Spring Salamander vs. Cave Salamander
• Spring Salamander vs. Long-tailed Salamander
• Spring Salamander vs. Midland Mud Salamander
• Spring Salamander vs. Northern Dusky Salamander
• Spring Salamander vs. Red Salamander
• Squirrel Treefrog vs. Bird-voiced Treefrog
• Squirrel Treefrog vs. Cope's Gray Tree Frog
• Squirrel Treefrog vs. Gray Treefrog
• Squirrel Treefrog vs. Green Treefrog
• Streamside Salamander vs. Blue-spotted Salamander
• Streamside Salamander vs. Jefferson Salamander
• Streamside Salamander vs. Mole Salamander
• Streamside Salamander vs. Northern Slimy Salamander
• Strecker's Chorus Frog vs. Boreal Chorus Frog
• Strecker's Chorus Frog vs. Spotted Chorus Frog
• Strecker's Chorus Frog vs. Spring Peeper
• Stripe-necked Musk Turtle vs. Eastern Mud Turtle
• Stripe-necked Musk Turtle vs. Eastern Musk Turtle
• Stripe-necked Musk Turtle vs. Mississippi Mud Turtle
• Stripe-necked Musk Turtle vs. Razor-backed Musk Turtle
• Striped Mud Turtle vs. Eastern Mud Turtle
• Striped Mud Turtle vs. Eastern Musk Turtle
• Striped Newt vs. Eastern Newt
• Striped Plateau Lizard vs. Common Side-blotched Lizard
• Striped Plateau Lizard vs. Ornate Tree Lizard
• Striped Racer vs. North American Racer
• Striped Swampsnake vs. Black Swampsnake
• Striped Swampsnake vs. Glossy Swampsnake
• Striped Whipsnake vs. Black-necked Garter Snake
• Striped Whipsnake vs. Common Coachwhip
• Striped Whipsnake vs. North American Racer
• Striped Whipsnake vs. Striped Racer
• Striped Whipsnake vs. Western Patch-nosed Snake
• Striped Whipsnake vs. Western Terrestrial Garter Snake
• Suwannee Alligator Snapping Turtle vs. Common Snapping Turtle
• Talladega Seal Salamander vs. Chattooga Dusky Salamander
• Talladega Seal Salamander vs. Spotted Dusky Salamander
• Tamaulipan Hook-nosed Snake vs. Mexican Hognose Snake
• Tamaulipan Milksnake vs. Long-nosed Snake
• Tamaulipan Milksnake vs. Texas Coralsnake
• Tamaulipan Milksnake vs. Western Milksnake
• Tarahumara Frog vs. American Bullfrog
• Taylor's Ground Snake vs. Flat-headed Snake
• Tehachapi Slender Salamander vs. Black-bellied Slender Salamander
• Tehachapi Slender Salamander vs. Gregarious Slender Salamander
• Tehachapi Slender Salamander vs. Southern California Slender Salamander
• Temblor Legless Lizard vs. Bakersfield Legless Lizard
• Temblor Legless Lizard vs. Northern Legless Lizard
• Temblor Legless Lizard vs. San Diegan Legless Lizard
• Tennessee Cave Salamander vs. Spring Salamander
• Texas Banded Gecko vs. Mediterranean Gecko
• Texas Blind Snake vs. Brahminy Blindsnake
• Texas Blind Snake vs. Western Threadsnake
• Texas Cooter vs. Pond Slider
• Texas Cooter vs. Rio Grande Cooter
• Texas Cooter vs. River Cooter
• Texas Cooter vs. Texas Map Turtle
• Texas Coralsnake vs. Long-nosed Snake
• Texas Coralsnake vs. Scarletsnake
• Texas Coralsnake vs. Texas Scarletsnake
• Texas Coralsnake vs. Western Milksnake
• Texas Horned Lizard vs. Desert Horned Lizard
• Texas Horned Lizard vs. Greater Short-horned Lizard
• Texas Horned Lizard vs. Regal Horned Lizard
• Texas Horned Lizard vs. Roundtail Horned Lizard
• Texas Lyre Snake vs. Chihuahuan Nightsnake
• Texas Lyre Snake vs. Gray-banded Kingsnake
• Texas Lyre Snake vs. Rock Rattlesnake
• Texas Map Turtle vs. Pond Slider
• Texas Patch-nosed Snake vs. Mountain Patch-nosed Snake
• Texas Patch-nosed Snake vs. Western Ribbon Snake
• Texas Salamander vs. Cascade Caverns Salamander
• Texas Scarletsnake vs. Long-nosed Snake
• Texas Scarletsnake vs. Tamaulipan Milksnake
• Texas Spiny Lizard vs. Blue Spiny Lizard
• Texas Spiny Lizard vs. Crevice Spiny Lizard
• Texas Spiny Lizard vs. Northern Rose-bellied Lizard
• Texas Spiny Lizard vs. Prairie Lizard
• Texas Spiny Lizard vs. Twin-spotted Spiny Lizard
• Texas Toad vs. Couch's Spadefoot
• Texas Toad vs. Great Plains Toad
• Texas Toad vs. Mexican Spadefoot
• Texas Toad vs. Plains Spadefoot
• Texas Toad vs. Red-spotted Toad
• Texas Toad vs. Woodhouse's Toad
• Texas Tortoise vs. Ornate Box Turtle
• Thornscrub Hook-nosed Snake vs. Chihuahuan Hook-nosed Snake
• Thornscrub Hook-nosed Snake vs. Long-nosed Snake
• Thornscrub Hook-nosed Snake vs. Sonoran Coralsnake
• Three-lined Salamander vs. Long-tailed Salamander
• Three-lined Salamander vs. Southern Two-lined Salamander
• Three-lined Salamander vs. Western Dwarf Salamander
• Three-toed Amphiuma vs. Red River Mudpuppy
• Three-toed Amphiuma vs. Western Lesser Siren
• Three-toed Box Turtle vs. Common Box Turtle
• Three-toed Box Turtle vs. Ornate Box Turtle
• Tiger Rattlesnake vs. Arizona Black Rattlesnake
• Tiger Rattlesnake vs. Desert Nightsnake
• Tiger Rattlesnake vs. Gopher Snake
• Tiger Rattlesnake vs. Mojave Rattlesnake
• Tiger Rattlesnake vs. Prairie Rattlesnake
• Tiger Rattlesnake vs. Rock Rattlesnake
• Tiger Rattlesnake vs. Sidewinder
• Tiger Rattlesnake vs. Sonoran Lyre Snake
• Tiger Rattlesnake vs. Southwestern Speckled Rattlesnake
• Tiger Rattlesnake vs. Western Diamond-backed Rattlesnake
• Tokay Gecko vs. Indo-Pacific House Gecko
• Tokay Gecko vs. Tropical House Gecko
• Trans-Pecos Blind Snake vs. Texas Blind Snake
• Trans-Pecos Ratsnake vs. Great Plains Ratsnake
• Tropical House Gecko vs. Asian House Gecko
• Tropical House Gecko vs. Common Four-clawed Gecko
• Tropical House Gecko vs. Indo-Pacific House Gecko
• Tropical House Gecko vs. Mediterranean Gecko
• Tropical House Gecko vs. Moorish Gecko
• Tropical House Gecko vs. Mourning Gecko
• Twin-spotted Rattlesnake vs. Arizona Black Rattlesnake
• Twin-spotted Rattlesnake vs. Desert Nightsnake
• Twin-spotted Rattlesnake vs. Gopher Snake
• Twin-spotted Rattlesnake vs. Mojave Rattlesnake
• Twin-spotted Rattlesnake vs. Prairie Rattlesnake
• Twin-spotted Rattlesnake vs. Rock Rattlesnake
• Twin-spotted Rattlesnake vs. Sidewinder
• Twin-spotted Rattlesnake vs. Sonoran Lyre Snake
• Twin-spotted Rattlesnake vs. Tiger Rattlesnake
• Twin-spotted Rattlesnake vs. Western Black-tailed Rattlesnake
• Twin-spotted Rattlesnake vs. Western Diamond-backed Rattlesnake
• Twin-spotted Spiny Lizard vs. Clark's Spiny Lizard
• Twin-spotted Spiny Lizard vs. Desert Spiny Lizard
• Twin-spotted Spiny Lizard vs. Southwestern Fence Lizard
• Twin-spotted Spiny Lizard vs. Yarrow's Spiny Lizard
• Two-striped Garter Snake vs. Common Garter Snake
• Two-striped Garter Snake vs. Western Terrestrial Garter Snake
• Two-toed Amphiuma vs. Gulf Coast Waterdog
• Two-toed Amphiuma vs. Three-toed Amphiuma
• Two-toed Amphiuma vs. Western Lesser Siren
• Upland Chorus Frog vs. Mountain Chorus Frog
• Upland Chorus Frog vs. Spring Peeper
• Upland Chorus Frog vs. Western Chorus Frog
• Valentine's Southern Dusky Salamander vs. Spotted Dusky Salamander
• Valley and Ridge Salamander vs. Allegheny Mountain Dusky Salamander
• Valley and Ridge Salamander vs. Eastern Red-backed Salamander
• Valley and Ridge Salamander vs. Four-toed Salamander
• Valley and Ridge Salamander vs. Northern Dusky Salamander
• Valley and Ridge Salamander vs. Northern Ravine Salamander
• Valley and Ridge Salamander vs. Wehrle's Salamander
• Van Dyke's Salamander vs. Cascade Torrent Salamander
• Van Dyke's Salamander vs. Columbia Torrent Salamander
• Van Dyke's Salamander vs. Dunn's Salamander
• Van Dyke's Salamander vs. Ensatina
• Van Dyke's Salamander vs. Larch Mountain Salamander
• Van Dyke's Salamander vs. Long-toed Salamander
• Van Dyke's Salamander vs. Rough-skinned Newt
• Van Dyke's Salamander vs. Western Red-backed Salamander
• Wandering Salamander vs. Arboreal Salamander
• Wandering Salamander vs. Del Norte Salamander
• Wandering Salamander vs. Speckled Black Salamander
• Wattle-necked Softshell Turtle vs. Amur Softshell Turtle
• Wattle-necked Softshell Turtle vs. Chinese Softshell Turtle
• Webster's Salamander vs. Southern Red-backed Salamander
• Wehrle's Salamander vs. Allegheny Mountain Dusky Salamander
• Wehrle's Salamander vs. Eastern Red-backed Salamander
• Wehrle's Salamander vs. Four-toed Salamander
• Wehrle's Salamander vs. Northern Dusky Salamander
• Wehrle's Salamander vs. Northern Ravine Salamander
• Weller's Salamander vs. Blue Ridge Dusky Salamander
• Weller's Salamander vs. Eastern Red-backed Salamander
• Weller's Salamander vs. Northern Pygmy Salamander
• West Virginia Spring Salamander vs. Spring Salamander
• Western Banded Gecko vs. Mediterranean Gecko
• Western Black-headed Snake vs. Common Sharp-tailed Snake
• Western Black-headed Snake vs. Forest Sharp-tailed Snake
• Western Black-headed Snake vs. Ground Snake
• Western Black-headed Snake vs. Ring-necked Snake
• Western Black-tailed Rattlesnake vs. Arizona Black Rattlesnake
• Western Black-tailed Rattlesnake vs. Desert Nightsnake
• Western Black-tailed Rattlesnake vs. Gopher Snake
• Western Black-tailed Rattlesnake vs. Mojave Rattlesnake
• Western Black-tailed Rattlesnake vs. Prairie Rattlesnake
• Western Black-tailed Rattlesnake vs. Rock Rattlesnake
• Western Black-tailed Rattlesnake vs. Sidewinder
• Western Black-tailed Rattlesnake vs. Sonoran Lyre Snake
• Western Black-tailed Rattlesnake vs. Southwestern Speckled Rattlesnake
• Western Black-tailed Rattlesnake vs. Tiger Rattlesnake
• Western Black-tailed Rattlesnake vs. Western Diamond-backed Rattlesnake
• Western Black-tailed Rattlesnake vs. Western Massasauga
• Western Diamond-backed Rattlesnake vs. Gopher Snake
• Western Diamond-backed Rattlesnake vs. Mojave Rattlesnake
• Western Diamond-backed Rattlesnake vs. Red Diamond Rattlesnake
• Western Diamond-backed Rattlesnake vs. Sidewinder
• Western Diamond-backed Rattlesnake vs. Sonoran Lyre Snake
• Western Diamond-backed Rattlesnake vs. Southwestern Speckled Rattlesnake
• Western Diamond-backed Rattlesnake vs. Western Glossy Snake
• Western Diamond-backed Rattlesnake vs. Western Rattlesnake
• Western Dwarf Salamander vs. Southern Red-backed Salamander
• Western Dwarf Salamander vs. Southern Two-lined Salamander
• Western Earless Lizard vs. Greater Short-horned Lizard
• Western Earless Lizard vs. Prairie Lizard
• Western Earless Lizard vs. Zebra-tailed Lizard
• Western Fence Lizard vs. Common Sagebrush Lizard
• Western Fence Lizard vs. Desert Collared Lizard
• Western Fence Lizard vs. Desert Horned Lizard
• Western Fence Lizard vs. Greater Short-horned Lizard
• Western Fence Lizard vs. Long-nosed Leopard Lizard
• Western Fence Lizard vs. Northern Alligator Lizard
• Western Fence Lizard vs. Plateau Fence Lizard
• Western Fence Lizard vs. Pygmy Short-horned Lizard
• Western Fence Lizard vs. Western Whiptail
• Western Foxsnake vs. Eastern Milksnake
• Western Foxsnake vs. Great Plains Ratsnake
• Western Glossy Snake vs. Coast Night Snake
• Western Glossy Snake vs. Desert Nightsnake
• Western Glossy Snake vs. Gopher Snake
• Western Glossy Snake vs. Sidewinder
• Western Grotto Salamander vs. Dark-sided Salamander
• Western Leaf-nosed Snake vs. Coast Night Snake
• Western Leaf-nosed Snake vs. Desert Nightsnake
• Western Leaf-nosed Snake vs. Sidewinder
• Western Leaf-nosed Snake vs. Western Glossy Snake
• Western Massasauga vs. Prairie Rattlesnake
• Western Milksnake vs. Eastern Milksnake
• Western Narrow-mouthed Toad vs. Eastern Narrow-mouthed Toad
• Western Patch-nosed Snake vs. North American Racer
• Western Patch-nosed Snake vs. Striped Racer
• Western Patch-nosed Snake vs. Western Terrestrial Garter Snake
• Western Ratsnake vs. Eastern Milksnake
• Western Ratsnake vs. Great Plains Ratsnake
• Western Ratsnake vs. Prairie Kingsnake
• Western Ratsnake vs. Western Foxsnake
• Western Rattlesnake vs. Arizona Black Rattlesnake
• Western Rattlesnake vs. Prairie Rattlesnake
• Western Rattlesnake vs. Sonoran Lyre Snake
• Western Rattlesnake vs. Western Black-tailed Rattlesnake
• Western Rattlesnake vs. Western Glossy Snake
• Western Ribbon Snake vs. Plains Garter Snake
• Western Skink vs. Many-lined Skink
• Western Spadefoot vs. Great Basin Spadefoot
• Western Spadefoot vs. Western Toad
• Western Spiny-tailed Iguana vs. Black Spiny-tailed Iguana
• Western Spiny-tailed Iguana vs. Green Iguana
• Western Terrestrial Garter Snake vs. Common Garter Snake
• Western Terrestrial Garter Snake vs. Plains Garter Snake
• Western Threadsnake vs. Brahminy Blindsnake
• Western Threadsnake vs. Southwestern Blackhead Snake
• Western Tiger Salamander vs. Eastern Tiger Salamander
• Western Toad vs. Great Plains Toad
• Western Toad vs. Woodhouse's Toad
• Western Whiptail vs. Common Sagebrush Lizard
• Western Whiptail vs. Desert Collared Lizard
• Western Whiptail vs. Desert Horned Lizard
• Western Whiptail vs. Greater Short-horned Lizard
• Western Whiptail vs. Long-nosed Leopard Lizard
• Western Whiptail vs. Northern Alligator Lizard
• Western Whiptail vs. Pygmy Short-horned Lizard
• Western Wormsnake vs. Common Wormsnake
• Western Wormsnake vs. Flat-headed Snake
• Western Wormsnake vs. Red-bellied Snake
• Western Wormsnake vs. Smooth Earthsnake
• Wintu Shasta Salamander vs. Ensatina
• Wintu Shasta Salamander vs. Klamath Black Salamander
• Wintu Shasta Salamander vs. Shasta Black Salamander
• Wolf Dusky Salamander vs. Carolina Mountain Dusky Salamander
• Wolf Dusky Salamander vs. Seal Salamander
• Wood Frog vs. Green Frog
• Wood Turtle vs. Northern Map Turtle
• Wood Turtle vs. Painted Turtle
• Wood Turtle vs. Pond Slider
• Wood Turtle vs. Spotted Turtle
• Woodhouse's Toad vs. American Toad
• Woodhouse's Toad vs. Fowler's Toad
• Wyoming Toad vs. Western Toad
• Wyoming Toad vs. Woodhouse's Toad
• Yaqui Black-headed Snake vs. Chihuahuan Black-headed Snake
• Yaqui Black-headed Snake vs. Plains Black-headed Snake
• Yaqui Black-headed Snake vs. Southwestern Blackhead Snake
• Yarrow's Spiny Lizard vs. Desert Spiny Lizard
• Yarrow's Spiny Lizard vs. Granite Spiny Lizard
• Yarrow's Spiny Lizard vs. Southern Sagebrush Lizard
• Yarrow's Spiny Lizard vs. Western Fence Lizard
• Yellow Mud Turtle vs. Common Snapping Turtle
• Yellow Mud Turtle vs. Eastern Mud Turtle
• Yellow Mud Turtle vs. Eastern Musk Turtle
• Yellow-blotched Map Turtle vs. Pascagoula Map Turtle
• Yonahlossee Salamander vs. Eastern Red-backed Salamander
• Yonahlossee Salamander vs. White-spotted Slimy Salamander
• Yosemite Toad vs. Western Toad
• Yuman Desert Fringe-toed Lizard vs. Zebra-tailed Lizard
• Zebra-tailed Lizard vs. Common Side-blotched Lizard
• Zebra-tailed Lizard vs. Long-nosed Leopard Lizard

Open Wildsight