Does anyone know of a link to a list of fruits and vegetables that are good for mallard ducks?

Image by francescominciotti
And the story goes: the Duck race is a a non-competetive, in aid of charity contest that take place, every year since 2005, in several cities all around the US. You can «adopt» a rubber duck (as the ones shown in this picture) and, if your duck places on the first five positions, you’ll win a prize.
This year, our duck was number 131.254!
As shown in the coming pictures, the huge load is dumped from Columbus bridge into Chicago river from a yellow truck, and then the huge group is pushed from a firefighters boat with firehydrants, till they reach the finishing line, right before the Michigan av. bridge.
The whole thing is about charity, as the money raised (5$ for adopting a duck in the race, and some merchandising that is, indeed, very cool, such as the two ducks shown on the pictures, named Alfredino and Alfredone) go to the Special Olympics. You can learn more on the official website.

Our duck — it goes withouth saying — didn’t win a thing, but our deepest enjoyment of the entire contest.

Great, great idea!

Question by Cindy: Does anyone know of a link to a list of fruits and vegetables that are good for mallard ducks?
or does anyone just know of any themselves. i am going to be raising some and am planning on growing some fruits and veggies in my backyard and wanted to know what would be beneficial to the mallards
thank you both, you both said almost the exact same thing and you were very helpful

Feel free to answer in the comment section below