Laboratory Animal Medicine

Laboratory Animal Medicine (Third Edition)

American College of Laboratory Animal Medicine
2015, Pages 351-386
Laboratory Animal Medicine

Chapter 8 - The Laboratory Woodchuck (Marmota monax)

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The Eastern woodchuck, Marmota monax, is in the family Sciuridae of the order Rodentia. Common names include groundhog, whistle-pig, and chuck. Natural distribution includes the Eastern and Midwestern United States, Southeastern Alaska, and Southern Canada. The woodchuck is a large, burrow- digging animal with a thickset body, short legs, long claws, broad flat head, almost no neck, small, round ears, and a short, hairy tail. Adults in captivity reach an average body size of 3–5 kg in males, and 2.5–5 kg in females. Colors vary from a grizzly gray-brown to reddish, with a darker head and black feet. Black as well as white (presumably albino) woodchucks have been reported. The fur consists of a soft dense undercoat and a longer, coarse upper fur.

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