flying phalanger

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of several omnivorous arboreal marsupials of the family Petauridae, especially one of the genus Petaurus, native to Australia and New Guinea and having the ability to glide through the air by extending large folds of skin on the sides of the body between the forelegs and hind legs.

from The Century Dictionary.

• noun A general popular name of the petaurists or flying marsupial animals of the family Phalangistidæ, having a parachute-like fold of skin along the sides by which they are enabled to take flying leaps through the air.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun nocturnal phalangers that move with gliding leaps using parachute-like folds of skin along the sides of the body