The Northern flying squirrel is the smallest arboreal squirrel in Oregon. It is typically squirrel-like except that the fore- and hind legs are connected by a furred patagium that extends from the ankle to the wrist. It is lead colored with buffy brown to brown tips.

It occurs in forested areas west of the Cascade Range and eastward to near Lakeview, Lake County and Paulina Lake, Deschutes County. The species also occurs in the Blue, Ochoco, and Wallowa mountains.

Northern flying squirrels are mostly nocturnal although individuals may be observed abroad during light hours on rare occasions. They are usually active for two hours immediately after sunset, then after a sojourn in the nest are active for about one and a quarter hours in the few hours before sunrise. Activity continues throughout the year, even at low temperatures and in snow.

Photo by Jim Collins, ODFW