The only true flying fish are certain freshwater hatchetfish and butterfly fish. The tropical flying fish in fact glides. In birds, power for flying comes from the breast muscles, which control both the up and down strokes of the wing. Wing shape depends on the kind of flight; narrow for gliding and broad for soaring.
The only flying mammals are the bats, whose wings are composed of skin stretched between the finger and back legs.
Related categories AERODYNAMICS AND AERONAUTICS
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