I give you, THA DACK!

DACK FACTS:

Ducks exploit a variety of food sources such as grasses, aquatic plants, fish, insects, small amphibians, worms, and small molluscs.

Ducks have many economic uses, being farmed for their meat, eggs, feathers, (particularly their down). They are also kept and bred by aviculturists and often displayed in zoos. Almost all the varieties of domestic ducks are descended from the Mallard (Anas platyrhynchos), apart from the Muscovy Duck(Cairina moschata). Many domestic breeds have become much larger than their wild ancestor, with a "hull length" (from base of neck to base of tail) of 30 cm (12 inches) or more and routinely able to swallow an adult British Common Frog Rana temporaria whole; the wild mallard's "hull length" is about 6 inches.

This information is from wikipedia, for more information go on http://en.wikipedia.org/wiki/Duck