It's flapping jaws that get people into trouble.
Passing near Mount Caucasus, they heard the groans of Prometheus and the flapping of the wings of the eagle which gnawed his liver.
Their sight is very bad; but they are quick of hearing, and their scent is very keen; they are, too, often accompanied by rhinoceros birds, which, by running about their heads, flapping their wings, and screeching at the same time, frequently give them notice of the approach of danger.
Somewhat slow flapping of which impels the body at each stroke with a manifest though easy jerk.
"The Sioux say that the thunder is the sound of the cloud-bird flapping his wings."
No one ever saw a bird in the air flapping its wings towards its tail.
The production of flight by the vertical flapping of wings is in some respects the most difficult, but this also has been attempted and achieved.
We are eager to tunnel under the Atlantic and bring the Old World some weeks nearer to the New; but perchance the first news that will leak through into the broad, flapping American ear will be that the Princess Adelaide has the whooping cough.
But when I stood on the shore they at once rose up with a great flapping of wings at the signal of their commander, and when they had got into rank circled about over my head, twenty-nine of them, and then steered straight to Canada, with a regular honk from the leader at intervals, trusting to break their fast in muddier pools.
One could already see the soldiers' shaggy caps, distinguish the officers from the men, and see the standard flapping against its staff.
Thousands of crows rose above the walls and circled in the air, cawing and noisily flapping their wings.