Tamias
umbrinus
(Uinta Chipmunk)
Description:
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).
Range:
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.
Habitat:
Found, at about 2000-3400 m, in coniferous forests, often near logs
and brush in open areas, and at edge of forests.
Diet:
Feeds on seeds and berries supplemented
with other plant material and insects. May occasionally eat birds' eggs and
carrion.
Ecology:
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. Caches food.
Reproduction:
Probably similar to other western
chipmunks which mate in spring and produce 1 litter of 4-5 altricial
young following a Gestation period of approximately
1 mo. Young are weaned and foraging on their
own in mid-July or August.
Conservation:
Status: | Protected nongame species |
Global Rank: |
|
State Rank: |
S1 |
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.