The white-tailed antelope squirrel is a localized resident of western Colorado. Open databases hold 142 Colorado records, and roughly half of them, 70, are iNaturalist photos. That high share fits the animal’s habits: unlike the state’s shy nocturnal rodents, this little ground squirrel is active in broad daylight and rarely bothered by people.
A desert squirrel of the western edge
This is a creature of hot, arid shrubland: saltbush and blackbrush flats, pinyon-juniper breaks, and rocky desert benches. In Colorado it barely crosses the state line, holding to the far western valleys where that habitat exists. The Grand Valley around Grand Junction in Mesa County is its stronghold, with scattered records south through the Gunnison and Dolores country and along the canyon rims near Colorado National Monument.
Built for the heat
Where most desert mammals wait out the midday sun, the antelope squirrel works through it. It carries its short tail arched flat over its back, white underside up, using it as a mobile sunshade, and it sheds excess heat by ducking briefly into a cool burrow before darting out again. It is an opportunist at the table too, taking seeds, green shoots, and insects as each comes into season.
Active all year
Its records trickle across every month because this squirrel does not hibernate. It stays above ground through winter, shuttling between burrow and surface on mild days, so the seasonal signal is a gentle spring rise in activity rather than the hard on-off switch of a true hibernator. NatureServe rates it apparently secure in Colorado, and the IUCN lists it as Least Concern.
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