(Crotalus pyrrhus)
Common names: southwestern speckled rattlesnake, Mitchell's rattlesnake, more.Crotalus pyrrhus is a venomous pitviper species found in the southwestern United States and northwestern Mexico. A medium-sized snake, it is found mostly in rocky country, active at night and feeding on small mammals. The coloration is variable and depends on the color of the rocks and soil of the habitat.