1.   Dusky wings flapped overhead.

2.   Her wings flapped, and the duck took immediate flight.

3.   It soars the length of the awning, wings flapping once, twice to propel it along an unerring flight path.

4.   A pigeon emerges, wings flapping noisily, from the tower.

5.   The answer was a mechanism that allows the wings to flap and rotate simultaneously.

6.   They also reoriented their shoulder joints to let their wings flap.

7.   When an insect wing flaps, its front edge goes down and forward and then up and backward, tracing a flattened figure eight.

8.   When it came out of the water, wings flapping and tail twitching, I thought it was some kind of monster.