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Photo credit:

Elí García-Padilla

Common name

Oaxacan Small-headed Rattlesnake

Scientific name

Crotalus intermedius gloydi

Conservation Status

Amenazada (A) - Mexico

Federal and State Protections


Range Map


Countries of Occurrence


Adult size

45.7cm (18in) - 60.9cm (24in)

States or Providence 

Oaxaca, Puebla


Species Description

The Oaxacan small-headed rattlesnake, also known as Gloyd's small-headed rattlesnake, is a small species of snake found in the highlands of southern Mexico. Oaxacan small-headed rattlesnakes are often dark grey, sometimes purple or brownish, with jagged blotches of a darker color along the sides. A distinguishing feature of this snake is a black streak above the eye and a white streak below.

It occupies elevations from 1,000 - 3,000m above sea level, and can be found in a variety of habitats from tropical cloud forest, to dry pine-oak forests and even semi-arid deserts. This species is active during the day. It is an ambush predator, targeting mostly lizards of the genus Sceloporus (fence & scrub lizards), but occasional rodent and amphibian (toad) prey have been recorded.

Fun fact: This subspecies is named after American Herpetologist Howard K. Gloyd.

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