When 'wings' are mentioned, most people at once think of birds. But wings, and the consequent power of flight, are by no means limited to birds. Among the mammals, for example, bats have wings and are excellent flyers. In both birds and bats, the wings are merely modified front legs.
©1932 by Iowa State Teachers College
Abbott, Roy L.
Science Bulletin: Vol. 4:
7, Article 9.
Available at: https://scholarworks.uni.edu/science_bulletin/vol4/iss7/9