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| | Morphology of the Chiroptera |
 | | Unlike birds and pterosaurs, in which the wing is supported by the bones of the arm and one finger, a bat's wing membrane, or patagium, is supported by the arm and by four highly elongated fingers (hence the name Chiroptera, or "hand-wing," for the bats). |
 | | The patagium extends all the way around to the bat's hind legs and tail, where it forms a flap called the uropatagium, supported by specialized foot bones called calcars. |
 | | Not only does the uropatagium help the bat fly and maneuver, it is often used to sweep prey, such as insects on the wing, into the bat's mouth while the bat is in flight. |
| www.ucmp.berkeley.edu /mammal/eutheria/chiromm.html (459 words) |
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