The white-tailed deer (Odocoileus virginianus) geta its name from the long white hair on the underside of the tail and rump. The smallest members of the North American deer family, it is also known as the whitetail or Virginia deer. Although the white-tailed deer of North and South America are currently recognised as one species, genetically these deer are further apart than are white-tailed and black-tailed deer in North America.