Rattlesnakes give birth live, and can have up to 25 babies (called 'neonates') in a brood. Western rattlesnakes are live on the ground but sometimes may climb into shrubs or trees. Habitat destruction also poses a danger to the Eastern species. The western diamondback rattlesnake is the largest of the 32 known species of rattlesnakes found in North America, capable of growing to a length of 8.5 feet (2.6 meters). Rattlesnakes exist in almost all areas of the lower 48 states. Western diamondback rattlesnakes usually mate during the fall. It ranges from Virginia through the Carolinas, Georgia, Florida, Alabama, Mississippi, and parts of Louisiana. The western diamondback rattlesnake Gestation lasts 6 or 7 months and broods average 10 to 25 young. Western diamondback rattlesnakes are one of the most aggressive rattlesnakes in North America, and usually coils and rattles when threatened. Western Diamondback Rattlesnake Crotalus atrox-Western Diamondback Rattlesnakes are found throughout the Southwest and are, by far, the most common rattlesnake encountered in Bandelier National Monument.-Western Diamondback Rattlesnakes can be distinguished from most other rattlesnakes by a series of black and white bands just above their rattles. Full grown rattlesnakes can range from 3 to 7 feet in length. Full grown rattlesnakes can range from 3 to 7 feet in length. These snakes are carnivores, and feed only on other animals. This snake hunts by ambush, and needs sufficient ground cover to sneak up on prey. Humans often vilify these reptiles, but for the most part these rattlesnakes avoid confrontation. The rattlesnake’s habitat is anywhere with thick brush or vegetation. The western diamondback rattlesnake, which can be identified by the diamond-shaped blotches on its scales, is the largest snake in western North America. Rattlesnakes are found in almost every type of habitat, including prairies, marshes, deserts, and forests, but individual species can have extremely specific habitat requirements. The western diamondback lives in the southwestern United States and Mexico.The eastern diamondback lives in the southeastern United States. “Rattles are segments of keratin that fit loosely inside one another at the end of the snake’s tail,” explained Sara Viernum, a herpetologist based in Madison, Wisconsin. They use the collected venom to create antivenom, which can save the lives of snakebite victims. It figures in ancient mythology, ceramics and rock art and in modern story and media. The snakelets are fully-developed and capable of delivering a venomous bite from the moment they are born. Usually inactive between late October and early March, these snakes occasionally may be seen basking in the sun on warm winter days. For the most part, around Tucson, at this elevation and with the winters we have, almost all reptiles undergo a hibernation period. Both of these rattlesnakes have a similar appearance. The snake uses the rattle to warn potential aggressors to back off or to distract prey. A rattlesnake can move the rattle on its tail back and forth 20-100 times in just one second. Currently, two subspecies are recognized, including the nominate subspecies described here. They are generally not aggressive and lead a solitary life. It typically has a body length of 3-4 feet, and is able to deliver a large volume of venom. The Western lives primarily in arid regions with low rainfall, usually desert, desert edges, and scrub. The western diamondback rattlesnake is the largest of the 32 known species of rattlesnakes found in North America, capable of growing to a length of 8.5 feet (2.6 meters). The average rattlesnake can live 15 to 20 years. 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