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Western Black-tailed Rattlesnake vs. Prairie Rattlesnake

They meet in the grassland and rocky hills of New Mexico and west Texas. A: Black in the Western Black-tailed Rattlesnake; brown with darker brown rings, like the body in the Prairie Rattlesnake. B: Jagged, one colour per scale, with pale patches inside in the Western Black-tailed Rattlesnake; rounded brown blotches edged with thin pale lines in the Prairie Rattlesnake. C: The top of the snout black; no bold face stripes in the Western Black-tailed Rattlesnake; two pale stripes on the side of the face, one behind the eye in the Prairie Rattlesnake. Venomous: leave rattlesnakes alone and give them room.

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Western Black-tailed Rattlesnake

Crotalus molossus

Prairie Rattlesnake

Crotalus viridis
Western Black-tailed Rattlesnake vs. Prairie Rattlesnake: comparison sheet with the differences marked

Photographs via iNaturalist under Creative Commons licences; the photographers are credited on the sheet.

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