Ridge-nosed Rattlesnake vs. Western Black-tailed Rattlesnake
They meet in the canyons of the southeastern mountains. A: A raised rim of upturned scales round the tip of the snout in the Ridge-nosed Rattlesnake; no rim; the top of the snout black or dark brown in the Western Black-tailed Rattlesnake. B: Brown, banded like the body (dark only in the young) in the Ridge-nosed Rattlesnake; solid black in the Western Black-tailed Rattlesnake. C: Pale crossbars edged dark in the Ridge-nosed Rattlesnake; big jagged dark blotches holding pale patches in the Western Black-tailed Rattlesnake. D: Small: to 26 in (66 cm) in the Ridge-nosed Rattlesnake; big: to 48 in (122 cm) in the Western Black-tailed Rattlesnake. Both Ridge-nosed and Twin-spotted Rattlesnakes are protected in Arizona. Venomous: leave rattlesnakes alone and give them room.
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