Ridge-nosed Rattlesnake vs. Prairie Rattlesnake
Their ranges barely touch in southeastern Arizona. 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 Prairie Rattlesnake. B: Pale crossbars edged dark in the Ridge-nosed Rattlesnake; dark blotches edged pale, on green-grey or brown in the Prairie Rattlesnake. C: Bold white lines on the chin and face in the Ridge-nosed Rattlesnake; two thin pale lines across the side of the face in the Prairie Rattlesnake. Both Ridge-nosed and Twin-spotted Rattlesnakes are protected in Arizona. Venomous: leave rattlesnakes alone and give them room.
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