The southern flying squirrel (glaucomyi volans) actually glides, rather than flying. It is found in the eastern United States, from Canada to Florida and the Gulf of Mexico, but is rarely seen. These squirrels and their northern relatives are the only nocturnal squirrels. Their thick, soft, glossy fur is olive-brown on the upper body and white below. A folded layer of loose skin on each side of the body, from front leg to hind leg, enables them to glide downward from one tree to another. These squirrels live in forests and nest in hollow trees. They eat seeds, nuts, fruit, insects, and birds' eggs. Two to six young are born at a time, twice a year.