The habits of the eastern woodchuck (Marmota monax rufescens) have been studied by [Hamilton] (1934: 85-178), but the northern races are less well known. [Cowan] (1939: 77-79) gives observations on the habits, nests and burrows of Marmota monax canadensis.
Marmota flaviventris avara (Bangs)
Yellow-bellied marmot
Arctomys flaviventer avarus Bangs, Proc. New England Zoöl. Club, 1:68, July 31, 1899.
[Marmota flaviventer] avarus Trouessart, Catal. Mamm., viv. foss., suppl., p. 344, 1904.
Marmota flaviventris avara [Miller], U. S. Nat. Mus. Bull., 128:175, April 29, 1924.
Type.—Obtained at Okanogan, British Columbia, by A. C. Brooks on July 17, 1897; type in Museum of Comparative Zoölogy.
Measurements.—A male from 5 miles north of Entiat, Chelan County, measured: total length 610; length of tail 182; hind foot 70; ear 28.
Distribution.—From the eastern edge of the Cascade Mountains eastward, except, apparently, extreme northeastern Washington. Marginal records are:
Okanogan (W. W. D.) in the north, Wenas (W. W. D.) in the west, Pasco (M. V. Z.) in the south, and 14 mi. S. W. Pullman ([Howell], 1915: 42) in the east.