Order Anseriformes Wagler, 1831 - waterfowl and screamers Suborder Anseres Linnaeus, 1758 - waterfowl Family Anatidae Vigors, 1825 - ducks, geese, swans Subfamily Anatinae Vigors, 1825 - pond ducks Genus Nettapus Brandt, 1836 - green pygmy-goose