Phylum Chordata Bateson, 1885 - chordates
Subphylum Vertebrata Cuvier, 1812 - vertebrates
see Infraphylum Vertebrata Lamarck, 1801
Class Aves Linnaeus, 1758 - birds
see Subclass Aves Linnaeus, 1758
Order Anseriformes Wagler, 1831 - waterfowl and screamers
Family Anatidae Vigors, 1825 - ducks, geese, swans
Family Anhimidae Stejneger, 1885 - screamers