Ridge-nosed Rattlesnake vs. Twin-spotted Rattlesnake
Both are small, protected rattlers of the high southeastern mountains (Huachuca and Santa Rita Mountains); the Twin-spotted lives higher, on talus. A: A raised rim of upturned scales round the tip of the snout in the Ridge-nosed Rattlesnake; no rim on the snout in the Twin-spotted Rattlesnake. B: Bold white lines on the chin and the side of the face in the Ridge-nosed Rattlesnake; a dark stripe from behind the eye to the neck; no white lines in the Twin-spotted Rattlesnake. C: Pale crossbars edged dark in the Ridge-nosed Rattlesnake; two rows of small dark spots on grey in the Twin-spotted Rattlesnake. Both Ridge-nosed and Twin-spotted Rattlesnakes are protected in Arizona. Venomous: leave rattlesnakes alone and give them room.
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