Waterfowl Feeding on the Seeds
and Foliage of Ceratophyllum spp.
(Hornwort, Coontail)

Waterfowl Species
Scientific Name Common Name
Aix sponsa Wood Duck
Anas acuta Northern Pintail
Anas americana American Widgeon
Anas clypeata Northern Shoveler
Anas crecca Green-Winged Teal
Anas discors Blue-Winged Teal
Anas platyrhynchos Mallard
Anas rubripes* Black Duck
Anas strepera* Gadwall
Aythya affinis Lesser Scaup
Aythya americana Redhead
Aythya collaris Ring-Necked Duck
Aythya marila Greater Scaup
Aythya valisneria Canvasback
Bucephala albeola Bufflehead
Clangula hyemalis* Long-Tailed Duck
Oxyura jamaicensis Ruddy Duck

*At least 40% of vegetable matter that was consumed by
this duck was found to be Coontail (Ceratophyllum demersum)
in a study by Anderson (1959).

Other sources of information:
Martin et al. (1951/1961), Havera (1999), & Belrose (1942/1976)