Tamias umbrinus
(Uinta Chipmunk)

Order: Rodentia
Order Description:Rodents
Family: Sciuridae
Family Description: Chipmunks, Marmots and Squirrels

The Uinta chipmunk is larger than the yellow pine and least chipmunks, and its back is generally darker. The outermost stripe is black in both the yellow pine and least, but it is lacking or very obscure in the Uinta chipmunk. The ears are blackish in front and white behind. Total length is 8 to 9 inches (200 ­ 225 mm), tail length is 3.5 to 4 inches (90-100 mm) and they weigh 1 to 2.2 ounces (29 ­ 62 grams).

Distributional records are disjunct, but in general, range extends from southwestern Montana south to northern Arizona, and from western Colorado into eastern California. In Idaho this species has not been documented widely, but it should be found along the southeastern edge of the state.

Found, at about 2000-3400 m, in coniferousClick word for definition forests, often near logs and brush in open areas, and at edge of forests.

Feeds on seeds and berries supplemented with other plant material and insects. May occasionally eat birds' eggs and carrionClick word for definition.

Excavates burrows beneath rocks and shrubs. Dormant in winter in snow-covered areas; may appear above ground in warm weather on warm slopes, or may rouse and feed, but not leave burrow. CachesClick word for definition food.

Probably similar to other western chipmunks which mate in spring and produce 1 litter of 4-5 altricial Click word for definitionyoung following a GestationClick word for definition period of approximately 1 mo. Young are weanedClick word for definition and foraging on their own in mid-July or August.

Status: Protected nongame species

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Important State References:
Keller, B.L. 1986. Small mammal collections in Bear Lake, Bonneville, Cassia, Franklin, and Oneida Counties, Idaho: Final Report. Dept. Biol. Sciences, Idaho St. Univ. Pocatello. 7pp.

Information written by Donald Streubel,© 2000
Map image provided by
Stephen Burton,© 2000
Design by Ean Harker©1999, 2000.