Western Diamondback

A young Western diamondback in a defensive position.

Crotalus atrox

The Western Diamondback is one of the most iconic rattlesnakes in the Southwest. They can reach an average length of 3–5 feet, although larger individuals are becoming increasingly rare, as many snakes are killed before reaching their full size. Their most reliable identifying feature is the bold black-and-white banding on the tail, often called the “coon tail,” just before the rattle. Their backs are patterned with a chain of dark, diamond-shaped blotches, which can range in color from dusty gray to tan or even reddish, depending on habitat. Known for having a bit of a spicy personality, Western Diamondbacks are best described as defensive, not aggressive; they prefer to stand their ground with loud rattling and coiling displays when threatened, but they do not seek out conflict. They are most active in the warmer months of spring through fall (March–October), especially around dawn and dusk. During the heat of summer, they shift to being nocturnal, hunting at night when temperatures are cooler. In cooler months, they may bask during the day but are generally less active, and have been known to overwinter in dens with other snakes or animal species. Rattlesnakes like other viper species give live birth and are great mothers. They have been observed watching over and protecting the babies until their first shed.