Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
               Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
                 Order Anseriformes Wagler, 1831 - waterfowl and screamers
                   Family Anatidae Vigors, 1825 - ducks, geese, swans
                     Subfamily Anatinae Vigors, 1825 - pond ducks
                       Tribe Cairinini del Hoyo et al., 2014 see Subfamily Anatinae Vigors, 1825
                         1 Genus Amazonetta Boetticher, 1929
                         2 Genus Calonetta see Genus Callonetta Delacour, 1936
                         3 Genus Nettapus Brandt, 1836 - green pygmy-goose
                         4 Genus Plectropterus Stephens, 1824
                         5 Genus Cairina Fleming, 1822
                         6 Genus Sarcidiornis Agassiz, 1846 see Genus Sarkidiornis Eyton, 1838
                         7 Genus Chenonetta Brandt, 1836 - maned duck
                         8 Genus Aix Boie, 1828