The Fox Squirrel (or Eastern Fox Squirrel) and the Gray Squirrel (also known the Eastern* Gray Squirrel) are rodents in the family Sciuridae. Their suborder, Sciurinae, includes other tree squirrels, as well as ground squirrels, chipmunks, and marmots. There are 10 subspecies of Fox Squirrels and five of Gray Squirrels.
Fox Squirrels spend much of their time on the ground searching for food and prefer woodlands next to openings. They’re tolerant of prairie-type environments. Gray Squirrels prefer dense stands of trees. The two generally don’t share the same habitat, but when they do, they don’t interbreed. They have home territories of a few acres, where they spend their entire lives. You may have several squirrels living in your yard in overlapping territories.