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Tamias ochrogenys

Yellow-cheeked Chipmunk

Order: Rodentia
Family: Sciuridae

Image of Tamias ochrogenys
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Conservation Status: Least Concern.

Yellow-tailed chipmunks are common in California's dark, moist giant redwood forests. These relatively large chipmunks are hard to see but they can be recognized by a unique call given when intruders are present. Like other chipmunks, they eat seeds, fungi, a wide variety of vegetation, and insects. They molt twice a year, shedding and renewing their coats in fall and again in spring. The winter coat is long, silky, and dense. These chipmunks remain active all year rather than spending the winter in hibernation.

Also known as:
Redwood Chipmunk

Sexual Dimorphism:
Females are slightly larger than males.

Average: 261 mm
Range: 233-297 mm

Average: 89.3 g males; 94.1 g females
Range: 60-116.2 g males; 78-117.5 g females


Merriam, C.H., 1897.  Notes on the chipmunks of the genus Eutamias occurring west of the east base of the Cascade-Sierra system, with descriptions of new forms, p.195.  Proceedings of the Biological Society of Washington, 11:189-212.


Mammal Species of the World

Mammalian Species, American Society of Mammalogists' species account

Distribution of Tamias ochrogenys