Black Tailed Rattlesnake

Beautiful Black-tail on concrete

Black Tailed Rattlesnake-Crotalus molossus

The Black-tailed Rattlesnake is one of the more striking rattlesnakes of the Southwest, easily identified by its solid black tail just before the rattle. In southern New Mexico, these snakes are most often an olive-green color, blending beautifully into foothill and canyon habitats. By contrast, populations in Arizona tend to show more golden or yellow hues. Their bodies are patterned with irregular darker crossbands and a dark stripe that runs from the eye to the jaw.

Despite their size; averaging 3 to 4 feet, though some may grow larger—Black-tailed Rattlesnakes are often described as having a calm and curious disposition compared to other rattlesnake species. In fact, many individuals will sit quietly without rattling or striking, even during removal from driveways or yards. They are best thought of as reserved and defensive only when necessary, relying on their camouflage and patience rather than aggression.

They have been known to do some climbing up to basking ledges and tend to prey most on mammals. This species can also exist at higher altitudes with specimens being discovered at 12,000 feet elevation.