How do you write a sentence using the word duck as noun?

* The duck waddled across the pond. (This uses "duck" as a singular noun referring to a specific duck.)

* Ducks are known for their webbed feet. (This uses "ducks" as a plural noun referring to multiple ducks.)

* I saw a flock of ducks flying overhead. (This uses "ducks" as a collective noun referring to a group of ducks.)