Bryan Hughes (Rattlesnakesolutions.com)
Western Twin-spotted Rattlesnake
Crotalus pricei pricei
Federal and State Protections
Countries of Occurrence
United States of America
States or Providence
This small rattlesnake can be found in southeastern Arizona and down through Mexico along the Sierra Madre Occidental with a separate population also occurring among the Sierra Madre Oriental. These two populations are considered separate subspecies: the western twin-spotted rattlesnake (C. p. pricei) and the eastern twin-spotted rattlesnake (C. p. miquihuanus). The twin-spotted rattlesnake primarily feeds on lizards and mammals but has also been recorded as consuming bird nestlings, and there has been at least one instance of cannibalism. The snakes are most active during their breeding season June-September.
Fun fact: The twin-spotted rattlesnake is named after William Wightman "Billy" Price (1871–1922), a field biologist who studied the natural history of many species during a time of exploration and discovery. He primarily captured birds and mammals across North America for university collections, and he also collected rattlesnakes from Arizona and Mexico. Two fishes, two small mammals, and this rattlesnake are each named after him.