Smithsonian National Museum of Natural History, North American Mammals
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Ammospermophilus interpres

Texas Antelope Squirrel

Order: Rodentia
Family: Sciuridae

Image of Ammospermophilus interpres
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Conservation Status: Least Concern.

Notable for its running speed, the Texas Antelope Squirrel has the longest hindlimbs and tail of any antelope squirrel. In the field, the squirrels are noticeable because of the way they carry the tail arched forward over the back. This common inhabitant of the Chihuahua Plateau occurs in rocky habitats in desert mountain ranges, nesting in burrows or in between rocks and crevices, and eating various seeds, berries, and insects. Antelope squirrels do not hibernate--they are active year round.

Also known as:
Trader Spermophile

Sexual Dimorphism:

Average: 226 mm
Range: 220-235 mm

Average: 110 g
Range: 99-122 g


Merriam, C.H., 1890.  Descriptions of five new ground squirrels of the genus Tamias, p. 21.  North American Fauna, 4:17-22.


Mammal Species of the World

Mammalian Species, American Society of Mammalogists' species account

Distribution of Ammospermophilus interpres