They eat rice and read books. I think we need to watch out for the next takeover of the planet. It was never mentioned that ducks are unable to speak english or dutch, so therefore they must be able to. Watch out for the ducks and their inevitable hostile takeover.
Duolingo's Dutch course has some really weird sentences. DL already has a fascination with eating apples, rice, and bread. But Dutch is a bit off. I've seen a sentence that read "books are not for eating".