A common large North American marmot (Arctomys monax). It is usually reddish brown, more or less grizzled with gray. It makes extensive burrows, and is often injurious to growing crops. Called also ground hog.
- A common burrowing rodent (Marmota monax) of northern and eastern North America, having a short-legged, heavy-set body and grizzled brownish fur. Also called groundhog; also called regionally whistle pig.