What are the different types of lemmings?
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The snow, or collard, lemmings, Dicrostonyx, found in the arctic regions of Asia and North America, are pure white in winter and brown, gray, or reddish in summer; this color change is unique among rodents. They are also distinguished by the growth in winter of an extremely long two-pronged claw on the third and fourth finger of each forefoot; these claws may function in shoveling snow. Bog lemmings, members of the genus Synaptus, are found in marshy places in North America as far south as the N United States. The wood lemming, Myopus schisticolor, is found in N Eurasia. The steppe lemmings, members of the genus Lagarus, of S Russia and Mongolia, are properly classified as voles; the North American species of this genus, Lagarus curtatus, is found in the W United States and is known as the sagebrush vole.
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