The Eastern Gray Squirrel is a tree dwelling rodent, a very common species of squirrels, mostly found in North America. Grey Squirrels are highly adapted for climbing trees – they have tough curved claws, and the ability to reverse their hind foot 180 degrees to permit headfirst descent. It is often found in … Another place where black squirrels were artificially introduced is Battle Creek, Michigan. What is an Eastern Gray Squirrel? Eastern grey squirrels build their domed dens, called dreys, in the forks of trees, and are constructed of twigs and leaves. It is a tree squirrel, which belongs to the genus Scirus, and is native to Midwestern United states. Despite the large populations of black squirrels in these areas, they still account for only about 1 out of every 10,000 eastern gray squirrels. Eastern Grey Squirrel Family Name Sciuridae Species S. carolinensis. The Eastern grey squirrel (Sciurus carolinensis) may be cute and fuzzy to on-lookers, especially in the popular tourist areas of Stanley Park in Vancouver, but it is an invasive mammal in British Columbia that is ranked by the Invasive Species Specialist Group (ISSG) as one of the Top 100 Invasive Species in the world. Native to the eastern half of North America, grey squirrels were first introduced to Britain in the 1870s and are now widely distributed across the UK. They’re most often grey with a white underbody, but all-black and all-white variations are not uncommon. The presence of these squirrels in Great Britain is a result of their introduction in the 1800s. Eastern Grey Squirrel Life and Habits The Eastern grey squirrel is a very common tree squirrel in the eastern half of the US and Canada. Its fur is mainly black or gray, the gray color being grizzled and often banded with gray and black guard hairs, tinged white, with the underside being white. More black-coated Grey Squirrels occur in the north. The Eastern gray squirrel is a tree squirrel of medium size, and both males and females are of the same size and color. Gray squirrels are excellent climbers and can leap …