Ridge-nosed Rattlesnake vs. Western Diamond-backed Rattlesnake
They meet only where the canyons of the southeastern mountains open onto the grassland below. 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 Western Diamond-backed Rattlesnake. B: Pale crossbars edged dark in the Ridge-nosed Rattlesnake; dusty diamonds edged pale in the Western Diamond-backed Rattlesnake. C: Brown, banded like the body in the Ridge-nosed Rattlesnake; bold black and white rings of equal width in the Western Diamond-backed Rattlesnake. D: Small: to 26 in (66 cm) in the Ridge-nosed Rattlesnake; big: to 7 ft (213 cm) in the Western Diamond-backed Rattlesnake. Both Ridge-nosed and Twin-spotted Rattlesnakes are protected in Arizona. Venomous: leave rattlesnakes alone and give them room.
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