Class Aves Linnaeus, 1758 - birds
see Subclass Aves Linnaeus, 1758
Subclass Neornithes Gadow, 1893
see Clade Neornithes Gadow, 1893
Infraclass Neoaves Sibley et al., 1988
see Subcohort Neoaves Sibley et al., 1988
Parvclass Galloanserae Sibley, Ahlquist & Monroe Jr., 1988
see Subcohort Galloanserae Sibley, Ahlquist & Monroe Jr., 1988
Superorder Anserimorphae
see Order Anseriformes Wagler, 1831
Order Anseriformes Wagler, 1831 - waterfowl and screamers
Infraorder Anserides
see Suborder Anseres Linnaeus, 1758
Family Anatidae Vigors, 1825 - ducks, geese, swans
Subfamily Anatinae Vigors, 1825 - pond ducks
Tribe Anatini Vigors, 1825 - typical ducks
see Subfamily Anatinae Vigors, 1825
Genus Polysticta Eyton, 1836
Polysticta stelleri (Pallas, 1769) - Steller's eider