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The northern Mexican gartersnake, like the narrow-headed gartersnake, is being threatened by the loss of its streamside habitat and by competition from nonnative species. (Photo by Doug Hotle/ABQ Biopark)

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Feds declare Arizona, New Mexico gartersnakes threatened species

The U.S. Fish and Wildlife Service granted threatened species status Monday to northern Mexican and narrow-headed gartersnakes, saying the animals in Arizona and New Mexico could otherwise be in danger of extinction.