Eastern Black-tailed Rattlesnake vs. Ridge-nosed Rattlesnake
Both are mountain rattlesnakes of the borderlands (records share 2 one-degree squares). A: Rounded, dark across the front in the Eastern Black-tailed Rattlesnake; a raised rim of upturned scales round the tip in the Ridge-nosed Rattlesnake. B: No white lines in the Eastern Black-tailed Rattlesnake; bold white lines on the face in the Ridge-nosed Rattlesnake. The Ridge-nosed is small (to about 2 ft) and lives only in pine-oak canyons of the Animas Mountains in New Mexico.
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