Twin-spotted Rattlesnake vs. Rock Rattlesnake

Both are small grey rattlers of rocky slopes in the southeastern sky islands; the Twin-spotted lives higher, on talus in the pines. A: Two rows of small dark spots on grey, joining into one row near the tail in the Twin-spotted Rattlesnake; widely spaced, jagged black crossbands right across the back in the Rock Rattlesnake. B: A dark stripe from behind the eye to the neck in the Twin-spotted Rattlesnake; no dark stripe behind the eye in the Rock Rattlesnake. Both Ridge-nosed and Twin-spotted Rattlesnakes are protected in Arizona. Venomous: leave rattlesnakes alone and give them room.

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

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