What do ducks eat?

For those who want to know what ducks eat, please venture into the url below:

What does a duck eat?

There are some who think that ducks eat snails. Some of the websites did mention that.

Duck eats snail

However, given the structure of the beak of the duck (round beak), it is unlikely that it will eat snails. It's more for birds with sharper and more pointed beaks.

I could be wrong though.

Regards
Mr Wan