Eastern Twin-spotted Rattlesnake
Crotalus pricei miquihuanus
Federal and State Protections
Countries of Occurrence
Mexico, United States
Up to 66cm (26in)
States or Providence
Nuevo Leon, Tamaulipas, Coahuila
The western twin-spotted rattlesnake can be found in scrub-oak and agave-type habitats at higher elevations in the Sierra Madre Oriental. They primarily consume vertebrates including lizards, small mammals, and young birds
They are one of several "cloud island" species which colonized temperate forested highlands during the Pleistocene epoch. Surrounding lowland areas turned arid, which cut these separate populations off from one another (surrounded by environments uninhabitable to these species).
This species, the twin-spotted rattlesnake, is considered imperiled in Arizona, USA. The subspecies is endemic to Mexico, however, and occurs largely in unpopulated, isolated habitat.