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Eastern Gray Squirrel -
Non-native Species Global Rank
State Rank Reason below)
Agency Status USFWS
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State Rank Reason (see State Rank above)
Species is nonnative/ introduced
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Western Hemisphere Range
Observations in Montana Natural Heritage Program Database
Number of Observations:
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(Observations spanning multiple months or years are excluded from time charts)
Native to eastern broad-leafed deciduous forests, thrives in Climax Forest.
Will store (cache or hoard) food.
Quite arboreal. Intraspecific intolerance in vicinity of nest, but tolerant while foraging.
Breeding season from late December to the following September. Includes 2 peaks (January to February and May to June). Young born February to April and late June to August. Some females produce 0 to 1 litters per year. Altricial young.
Legend: View Online Publication Do you know of a citation we're missing? Foresman, K.R. 2001. The wild mammals of Montana. American Society of Mammalogists, Special Publication Number 12. Lawrence, KS. 278 pp. Foresman, K.R. 2012. Mammals of Montana. Second edition. Mountain Press Publishing, Missoula, Montana. 429 pp. Hoffmann, R.S., P.L. Wright, and F.E. Newby. 1969. The distribution of some mammals in Montana. I. Mammals other than bats. Journal of Mammalogy 50(3): 579-604. Joslin, Gayle, and Heidi B. Youmans. 1999. Effects of recreation on Rocky Mountain wildlife: a review for Montana. [Montana]: Montana Chapter of the Wildlife Society. Koprowski, J.L. 1994. Sciurus carolinensis. Mammalian Species. 480: 1-9. Reid, F. 2006. Peterson Field Guide to Mammals of North America, 4th Edition. Houghton Mifflin Company: Boston and New York, 608 pp. Web Search Engines for Articles on "Eastern Gray Squirrel"
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