One reason, doubtless, why squirrels are so bold and reckless in leaping through the trees is that, if they miss their hold and fall, they sustain no injury. Every species of tree-squirrel seems to be capable of a sort of rudimentary flying, at least of making itself into a parachute, so as to ease or break a fall or a leap from a great height.

The red squirrel is more common and less dignified than the gray, and oftener guilty of petty larceny about the barns and grain-fields.

Our flying squirrel is in no proper sense a flyer. On the ground, he is more helpless than a chipmunk, because less agile. He can only sail or slide down a steep incline from the top of one tree to the foot of another.

John Burroughs Quotes