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Common name

Guerreran Pygmy Rattlesnake

Scientific name

Crotalus exiguus

Conservation Status

Least Concern

Federal and State Protections

Countries of Occurrence


States or Providence 



Adult size

66cm (26in)

Species Description

This small rattlesnake, averaging about 26 inches long, is endemic to Guerrero, Mexico, in the Sierra Madre del Sur. Its diet consists of lizards, small mammals, and sometimes insects. In 2018, the subspecies under C. ravus were all elevated to species status, including the Guerreran pygmy rattlesnake. This divergence is based on newfound phylogenetic evidence.

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