Crotalus atrox
The Western Diamondback Rattlesnake is the largest rattlesnake species found in the recreation area. It averages in length from 3 to 4 feet long and is very heavy-bodied. Its head is considerably wider than its neck. It is usually a light gray brown in color with darker brown blotches along its entire length. The blotches are typically diamond shaped and are irregularly outlined with both lighter and darker flecks of color. The Diamondback is sometimes called the “coontail” because of the distinct black and white rings on its tail. Each ring is about the same width. The Western Diamondback's activity pattern is regulated by the temperature. It is diurnal or crepuscular when temperature permits, but it is mostly nocturnal during most of its active season. The females bear from 4 to 23 live young, which are 8 to 12 inches long at birth. Habitat: The Western Diamondback potentially can be found in all major habitat types within the recreation area. However, it is most common on lower mountain slopes and along washes and canyon bottoms. In Nevada, it is found only in the extreme south of the recreation area in the Newberry Mountains. It can be found throughout the Arizona side. Diet: It will take lizards and birds, but the bulk of its diet is made up of rodents appropriate to the size of the snake. Adaptations: With its venom delivery system to secure prey, its rattle to warn enemies away, and its large size, the Diamondback is well suited for survival. In addition, it is a prolific species and produces young at a higher rate than most other rattlesnake species. It also seems more able to adapt to human disturbance than most other snakes and is able to inhabit on or near developed lands.
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