At least forty-seven species of mammals can be found in the Great Dismal Swamp National Wildlife Refuge, representing most mammals found in Virginia. Visitors often see the white tailed deer. Other large and medium sized mammals present, but seen less often, include black bear, bobcat, river otter, mink, beaver, grey fox, red fox, raccoon, and ground hog. Smaller resident mammals include grey squirrel, southern flying squirrel, four species of shrew, six species of mice, one species of rat, two species of mole, two species of vole, and the southern bog lemming. Near sunset you can possibly see one of the ten species of bats documented as residents of the Great Dismal Swamp.