Meet the NYC flying squirrel (Glaucomys volans)

"Few of us ever get a good view of a flying squirrel, but then again, not many of us know they truly exist. Not unlike its cartoon depiction, as the brainy, be-goggled sidekick of Bullwinkle the Moose, the Southern flying squirrel is an impressively well-adapted resident of New York City. With a preference for older beech and oak woods, these squirrels are primarily nocturnal. An uncommon habitat and our very urban instinct to avoid late-night walks through obscure woodlands make finding one a deliberate effort."

"The flying squirrel (Glaucomys volans) does not actually fly — it glides. When a squirrel leaps from its perch in a tall tree, it spreads its limbs, stretching out its two patagia (thick, furred membranes that extend from its wrists to its ankles). In this way, a squirrel less than 10 inches long (including a tail almost half that length) can, in a single bound, cover 150 feet or more, gliding through the treetops effortlessly" READ MORE