flying squirrel

noun

1. any of various nocturnal tree squirrels, as Glaucomys volans, of the eastern U.S., having folds of skin connecting the fore and hind legs, permitting long, gliding leaps.

noun

1. any nocturnal sciurine rodent of the subfamily Petauristinae, of Asia and North America. Furry folds of skin between the forelegs and hind legs enable these animals to move by gliding leaps