Swift foxes are primarily nocturnal, but can sometimes be seen sunning themselves near the entrance to a den. They live on prairie grasslands just east of the Rocky Mountains. Learn more about the Vulpes velox, more commonly known as a...

The striking olive dorsum of the Olive-backed Pocket Mouse is set off by a yellowish stripe on the side and a white underside. This is the only species of pocket mouse east of the Rocky Mountains whose range extends well into Canada....

The kit fox has been thought by some to be a subspecies of the swift fox. This fox currently inhabits desert and semi-arid regions between the Sierra Nevada Mountains and the Rocky Mountains and on down into Baja California and the North...

Wolverines are widely distributed in the northern reaches of both hemispheres. In North America, they occupy remote habitats from the high mountainous interior of the Rockies to Arctic coastal tundra. Learn more about the Gulo gulo, more...

Northern Rock Deermice live in rocky outcrops and among boulders in pinyon-juniper-oak woodlands in the foothills of mountains from Colorado and New Mexico south to Texas and northern Mexico. Populations of the Mice are separated from...

Mountain Pocket Gophers live in meadows, pastures, and rocky slopes, in pine, fir, spruce, and hemlock forests at elevations above 1,545 m. They are active all year, and like other pocket gophers, they are solitary. Learn more about the...

Alpine chipmunks live only at high elevations in the Sierra Nevada Mountains of California. They are found in rocky areas such as rock-bordered alpine meadows, talus slopes, and rockslides, with such other mammals as pikas, ermine,...

Golden-mantled Ground Squirrels are familiar residents of open woodlands, brushy forest-edge habitats, dry margins of mountain meadows, and rocky slopes. They are quick to invade sunny, disturbed areas where pioneer plants provide good...