Ducks are waterfowl belonging to the family Anatidae. The term "duck" generally refers to smaller waterfowl, while "goose" refers to larger varieties. Ducks have webbed feet, short legs, and broad, flat bills.
They live in wetlands, rivers, lakes, and oceans around the world. Ducks are omnivores, eating aquatic plants, insects, and small fish. Many species migrate long distances during breeding season.