Waterfowl are birds that live in and around lakes, ponds and wetlands, such as ducks, geese and swans. Most eat grasses, aquatic plants, fish, insects, small amphibians and worms.
Ecologists have recorded several species in DuPage County. Resident waterfowl include the Canada goose (Branta canadensis), mallard (Anas platyrhynchos), American coot (Fulica americana), blue-winged teal (Anas discors), hooded merganser (Lophodytes cucullatus), pied-billed grebe (Podilymbus podiceps), ruddy duck (Oxyura jamaicensis) and wood duck (Aix sponsa). Migrants include the bufflehead (Bucephala albeola), canvasback (Aythya valisineria), common goldeneye (Bucephala clangula), green-winged teal (Anas crecca) and red-breasted merganser (Mergus serrator).