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Animas ridge-nosed rattlesnake
(Crotalus Willardi obscurus)
walrus
Description
They are reddish brown, orange-brown, or rust, and the chin and sides of the face are marked with sharply contrasting white lines on a dark reddish brown background. Their backs are marked with pale crossbars lined with darker coloration along the front and back edges. They have cream to white underside with occasional mottling of grayish to reddish brown. Their pupils are vertically elliptical and the dorsal scales are keeled. They have a slender neck and the head is broad and triangular. On the end of the tail is a rattle composed of a series of loosely interlocking keratinous sections.
Dimensions
They grow from 15 to 24 inches in length.
Diet
They primarily eat lizards, mice, and centipedes but they also occasionally take birds and scorpions.
Habitat & Range
They inhabit high elevations pine and oak woodlands. They can be found in the Animas and adjacent Peloncillo Mountains (Hidalgo County) in extreme southeastern Arizona and extreme southwestern New Mexico in the United States.
Conservation status
This is the only venomous snake that is listed as Threatened by the U.S. Fish and Wildlife Service, and is therefore afforded protection by the Endangered Species Act.

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© 2014 Oswaldo Rosales
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