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 Anserini Vigors, 1825 - geese see Subfamily Anserinae Vigors, 1825
                     01 Genus Anser Brisson, 1760
                     02 Genus Branta Scopoli, 1769 - Canada goose
                     03 Genus Cereopsis Latham, 1801 - Cape Barren goose
                     04 Genus Cyanochen Bonaparte, 1856
                     05 Genus Chloephaga Eyton, 1838
                     06 Genus Neochen Oberholser, 1918
                     07 Genus Alopochen Stejneger, 1885
                     08 Genus Tadorna Boie, 1822
                     09 Genus Tachyeres Owen, 1875
                     10 Genus Plectropterus Stephens, 1824
                     11 Genus Cairina Fleming, 1822
                     12 Genus Pteronetta Salvadori, 1895
                     13 Genus Sarkidiornis Eyton, 1838
                     14 Genus Nettapus Brandt, 1836 - green pygmy-goose