Ridge-nosed Rattlesnake vs. Arizona Black Rattlesnake
Their ranges only touch at the edges in the mountains of eastern 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 Arizona Black Rattlesnake. B: Reddish to grey-brown with pale crossbars in the Ridge-nosed Rattlesnake; dark grey-brown to black, black blotches edged by thin pale lines in the Arizona Black Rattlesnake. C: Small: to 26 in (66 cm) in the Ridge-nosed Rattlesnake; bigger: to 42 in (107 cm) in the Arizona Black Rattlesnake. Both Ridge-nosed and Twin-spotted Rattlesnakes are protected in Arizona. Venomous: leave rattlesnakes alone and give them room.
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