White-tailed Antelope Squirrel, A. leucurus (New Mexico, southern Arizona, Colorado, Utah, Nevada and north to Oregon). The most widely distributed species in the genus.
Texas Antelope Squirrel, A. interpres (Texas, New Mexico)
Insular Antelope Squirrel, A. insularis Espiritu Santo Island Baja California Sur (some authorities treat this as a subspecies of A. leucurus).
All are somewhat similar in appearance and behavior. They are around 14-17cm long with a 6-10cm tail, and weigh 110-150 grams. The tail is somewhat flattened. They have a single white stripe on the body and none on the face. They live in burrows, which they dig for themselves. They are diurnal, and do not hibernate (though they become less active during the winter), so they are fairly easily seen.
Of all Ammospermophilus, white-tailed antelope squirrels are the most widespread in North America; their general range is the Great Basin to Baja California.
Ammospermophilus leucurus will use burrows of other rodents, such as kangaroo rats, for shelter and will make numerous burrows of its own within its home range.
Ammospermophilus leucurus build nests for the young near the center of the burrow.
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