| Gray-collared chipmunks are found only in coniferous forests, at elevations of 1,950-3,440 m. They eat all kinds of vegetation, and collect and store acorns underground or in hollow logs. Their tracks are often seen in the snow, but they probably remain in their dens during the coldest months, sleeping or feeding on their cache of acorns. One litter, of 4-6, is born a year, usually in June in a nest under a log or stump. Nests have also been found in woodpecker holes in trees. When they are 36-40 days old, the young begin eating solid food, and less than a week later, stop nursing. By fall, they are almost fully grown.
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Females are slightly larger than males.
Allen, J.A., 1890. A Review of some of the North American ground squirrels of the genus Tamias, p. 94. Bulletin of the American Museum of Natural History, 3:45-116.
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