Eastern Black-tailed Rattlesnake vs. Rock Rattlesnake
Both are rattlesnakes of rocky slopes in the mountains of southern New Mexico and west Texas (records share 39 one-degree squares). A: Solid black in the Eastern Black-tailed Rattlesnake; salmon or peach with narrow dark rings in the Rock Rattlesnake. B: Broad dark crossbands in the Eastern Black-tailed Rattlesnake; narrow, jagged, widely spaced crossbands on blue-grey; flecked between in the Rock Rattlesnake. The Rock Rattlesnake is small (rarely over 2 ft); the Eastern Black-tailed grows to 4 ft.
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