1. Ducks were quacking noisily on the lake.

2. One wing's shredded, one's flapping, it's quacking up a storm.

3. 19 The water is full of thrashing, quacking excitement.

4. The ducks started quacking loudly when we threw them some bread.

5. About a dozen mallard ducks were sleeping on the sand or quacking in a subdued manner under the dock.