1.   Their great wings beat slowly.

2.   They skimmed low, passing so close to Simon that their wings beat at his head.

3.   Its wings beat slowly.

4.   Wings beat the winter air.

5.   Later, Zofia laments over a starling caught in her chimney, its wings beating frantically against the walls.

6.   Their wings beat a soft hum that competes with the wind.