These ducks were looking for a snack. I remember seeing a sign once that said not to feed ducks bread crumbs, but I saw people feeding them some anyway. Bread has no nutritional value. Instead us duck-feeders should give them corn, thawed frozen peas, oats, and lettuce or other greens. Of course, duck pellets works if you don't mind a trip to the feed store.
Linking to The Bird D-Pot