The Grey Squirrel is a native of the eastern United States and Canada but has been introduced into the British Isles and Italy. It is found in woodland and forest particularly where there are trees which produce nuts and seeds which will provide food over the winter.

In Britain it has fewer predators than in North America and has spread rapidly to the detriment of the native Red Squirrel S. vulgaris.

It is active all year though the female tends to be more active during the summer while the male is more active during the winter.

For further information see: Lawniczak, M. 2002. "Sciurus carolinensis" (On-line), Animal Diversity Web. Accessed April 28, 2005 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Sciurus_carolinensis.html