NNTRC Snakes

Scientific Name

Crotalus simus culminatus

Common Name 

Northwestern Neotropical Rattlesnake

Physical Characteristics

Adults commonly exceed 51 in (130 cm) in length, with males growing larger than females. Large males can grow up to 71 inches.

Geographic Range (Mexico)

This species is found from Mexico in southwestern Michoacán on the Pacific coast, and Veracruz and the Yucatan Peninsula on the Atlantic coast.

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Its habitats are semiarid, including dry or very dry tropical forests, thorn woodland, and arid scrub forest.


Small mammals, birds, and reptiles


Hemorrhagic and rarely any Neurotoxic effects occur.


A passive species that will coil up and strike when finally come into contact with. Mayan civilization used this snake as medicine by cooking it well and grinding it into a powder-like substance.

This page was last updated on: January 24, 2017