In Arizona, this means any area where the city borders native Sonoran Desert habitat is also likely a resource for the Western Diamondback. Our Gxx codes denote individual pieces. Western Diamondback Rattlesnake Facts. In the United States, they are quite common in the southwest. Usually inactive between late October and early March, these ectotherms occasionally may be seen basking in the sun on warm winter days. This species has also been reported on a number of islands in the Gulf of California, including San Pedro Mártir, Santa María (Sinaloa), Tíburon and the Turner Islands. It lives in elevations from below sea level up to 6,500 feet (2,000 m). The average venom yield per bite is usually between 250 and 350 mg, with a maximum of 700–800 mg.[5][25] Severe envenomation is rare but possible, and can be lethal. The rattles of the Western Diamondback grow as the snake does, adding a segment each time the snake sheds its skin. The Western Diamondback can exceed seven feet in length, and is the king of our twenty odd species of Southwestern desert rattlers. See Answer. The western diamondback rattlesnake, or Crotalus atrox, a member of the family Viperidae, the subfamily Crotalinae, and the genus Crotalus, has such a hold on the human psyche that it has been a symbol of the American Southwest from prehistoric into historic times.It figures in ancient mythology, ceramics and rock art and in modern story and media. The western diamondback lives in the southwestern United States and Mexico. [5] According to Pisani and Stephenson (1991), who conducted a study of the stomach contents of C. atrox in the fall and spring of Oklahoma, mammalian prey included prairie dogs (Cynomys ludovicianus), kangaroo rats (Dipodomys ordii), pocket gophers (Geomys bursarius and Cratogeomys castanops), voles (Microtus ochrogaster), woodrats (Neotoma floridana), pocket mice (Perognathus hispidus and P. flavescens), white-footed mice (Peromyscus leucopus and P. maniculatus), Old World rats and mice (Rattus norvegicus and Mus ssp. Well, it’s actually a little of both… A female rattlesnake will give birth to live young after carrying rattlesnake eggs inside her for about 90 days. Rattlesnakes, including C. atrox, are viviparous. Their prey varies between the species and the snake’s size. These snakes are carnivores, and feed only on other animals. The color of this striking snake ranges from brown to gray to pinkish, depending on the shade of its habitat. However, the Mojave rattler found in southeastern Utah is extremely toxic and excitable. Like all other members of the genus, they have a hollow rattle on the ends of their tails to warn off predators. Both species measure anywhere between 4 and 8 feet in length, but most measure under 7 feet long. In the United States, they are quite common in the southwest. Eastern diamondbacks have many fascinating characteristics. The western diamondback rattlesnake is responsible for most of the snakebites in northern Mexico and the U.S.A. Conservation Status . They range through Arkansas, Oklahoma, Texas, New Mexico, Arizona, and southern California. Most rattlesnake species live near open, rocky areas, as the rocks offer cover from predators. Specimens over 150 cm (5 ft) are infrequently encountered, while those over 180 cm (6 ft) are very rare, and the largest reported length considered to be reliable is 213 cm (7 ft). Aberrant morphology in western diamondback rattlesnakes (. This stripe is usually bordered below by a white stripe running from the upper preocular scale down to the supralabial scales just below and behind the eye. The females retain their eggs within their bodies, and give “live” birth when the eggs hatch. There are more than 24 rattlesnake species and all of them have that most-famous feature: the rattle! Snakes of the United States and Canada. They warn humans to stay away with their tail-based rattle, a technique often mimicked by non-lethal snakes, such as colubrids. But its northern range limit is south of the Utah border. Other common names for this species include western diamond-backed rattlesnake,[3] adobe snake, Arizona diamond rattlesnake, coon tail, desert diamond-back, desert diamond rattlesnake, fierce rattlesnake, spitting rattlesnake, buzz tail, Texan rattlesnake, Texas diamond-back, and Texas rattler. Like all vipers, these reptiles are ovoviviparous. Habitat and Distribution The eastern diamondback is native to the coastal plains of the southeastern United States. The snake uses the rattle to warn potential aggressors to back off or to distract prey. Though populations in certain regions face decline, the IUCN lists both the Eastern and Western species as Least Concern. The Western Diamondback Rattlesnake is, as far as rattlesnakes go, a generalist. One case reported by Vorhies (1948) involved a juvenile specimen that had attempted to eat a horned lizard (Phrynosoma solare), but died after the lizard's horns had punctured its esophagus, leaving the lizard stuck there. Eastern diamondback rattlesnakes live in the southeastern United States. [16], They are one of the few species of snakes that engage in scavenging behavior. Richards, I. S., & Bourgeois, M. M. (2014). The Western Diamondback can exceed seven feet in length, and is the king of our twenty odd species of Southwestern desert rattlers. Their gestation period lasts between 5 and 6 months. Western Diamondback Rattlesnake (Crotalus atrox) What they look like: Rattlesnakes are species of poisonous snakes generally called "pit vipers". The eastern diamondback can live beyond 20 years, but life expectancy in the wild is now typically shorter because of hunting and human expansion. McDiarmid RW, Campbell JA, Touré T. (1999). Norris R. (2004) "Venom Poisoning in North American Reptiles" in Campbell JA, Lamar WW. This snake hunts by ambush, and needs sufficient ground cover to sneak up on prey. Here's how you can tell it's the western diamondback. Read on to learn about the Diamondback. Mating occurs in the fall, and the females give birth to as many as 25 young, which may be as long as 30 cm (12 in). More often than not, however, rattlesnakes reside in rocky environments, as rocks help them to find cover and food. These rattlesnakes are known for their diamond scale patterning, their distinctive rattling sound, and venomous bite. Where do western diamondback rattlesnakes live? Gestation lasts six or seven months, and broods average about a dozen young. Western diamondback rattlesnakes are found in the United States from central Arkansas to southeastern and Central California, south into Mexico as far as northern Sinaloa, Hidalgo and northern Veracruz.

Although it is commonly believed that diamondbacks and timber rattlesnakes live in the Pacific Northwest, the only indigenous species in the region is the western rattlesnake (Crotalus oreganus). The rattlesnake’s habitat is anywhere with thick brush or vegetation. Rattlesnakes can be found in almost every U.S. state. It is common to see the western diamondback on rural blacktop roads in early evening, because of the heat retention of these surfaces, as ambient temperatures drops. The Eastern species lives only in the Southeast United States. Crotalus atrox can be active at any time of the day or night when conditions are favorable. Diamondbacks have many predators and not always because the predator wants to eat them. The snakes also feed from within on energy-rich lipid stores. When baby rattlesnakes snakes are born they are wrapped by a membrane from which they quickly escape. It ranges from Virginia through the Carolinas, Georgia, Florida, Alabama, Mississippi, and parts of Louisiana. It is likely responsible for the majority of snakebite fatalities in northern Mexico and the greatest number of snakebites in the U.S. No subspecies are currently recognized. The color of this striking snake ranges from brown to gray to pinkish, depending on the shade of its habitat. [20] In addition to hemorrhage, venom metalloproteinases induce myonecrosis (skeletal muscle damage), which seems to be secondary to the ischemia that ensues in muscle tissue as a consequence of bleeding and reduced perfusion.

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