In the days prior to and immediately following a full moon, there is often enough light in the hours after sunset for a person to meander along a well established woodland trail without the aid of a flashlight. By walking slowly and quietly, one can occasionally detect a small gray squirrel rustling about the dead leaves on the forest floor, climbing up a large trunk, or moving along the limb of a tree. While most squirrels strongly prefer to be active during the light of day, the flying squirrel favors the darkness of night and is the most common nocturnal tree dwelling mammal within the Park.
The flying squirrel is characterized by a loose fold of skin, called a patagium that extends from it front and hind legs and connects to its sides. This thin, furry membrane acts as a wing or airfoil when the animal stretches its appendages outward and enables it to glide forward as it slowly descends after leaping from a tree. The wide and flat tail of this rodent provides additional lift and greatly helps an airborne individual alter its flight path so it can accurately land at a selected spot. » Continue Reading.