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Twin Spotted Rattlesnake - Crotalus pricei


Adults usually do not exceed 50-60 cm in length. The maximum length recorded was 66 cm

The color pattern consists of a gray, bluish gray, brownish gray, or medium to reddish brown ground color, usually with a fine brown speckling. This is overlaid with a series of dorsal blotches that then to be divided down the median line to form 39-64 pairs.

Range & Habitat

Southeastern Arizona south to southern Durango Mexico. It lives in arid rocky area high in the mountains in open yellow pine and oak woodlands into evergreen forests. Elevation is 6300 to 10,000 feet.


Late July to August with females giving birth to 3 - 8 young which are 6 1/4 to 8 1/4 inches long.

Additional Notes

The buzz of its rattle, like that of other rattlesnakes, sounds like a cicada and can be heard only within a few yards. It is often encountered in canyons sunning itself on rock slides or exposed slopes. In Arizona it shares its habitat with the Rock Rattlesnake. Its diet consists of lizards and small rodents.


Subspecies Common name Geographic range

C. p. miquihuanus

Eastern twin-spotted rattlesnake

Mexico: southeastern Coahuila, Nuevo León and Tamaulipas.

C. p. pricei

Western twin-spotted rattlesnake

United States: southeastern Arizona. Mexico: Sonora, Chihuahua and Durango.