Bird wing
Paired forelimb that allows birds to fly / From Wikipedia, the free encyclopedia
Not to be confused with the butterfly family Birdwing.
Bird wings are a paired forelimb in birds. The wings give the birds the ability to fly, creating lift.
Terrestrial flightless birds have reduced wings or none at all (for example, moa). In aquatic flightless birds (penguins), wings can serve as flippers.[1]