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 Anatini Vigors, 1825 - typical ducks see Subfamily Anatinae Vigors, 1825
                         Genus Anas Linnaeus, 1758 - Pacific black duck
                           01 Anas sparsa Eyton, 1838 - African black duck
                           02 Anas specularis King, 1828 - spectacled duck see Speculanas specularis (King, 1828)
                           03 Anas platyrhynchos Linnaeus, 1758 - mallard
                           04 Anas rubripes Brewster, 1902 - American black duck
                           05 Anas superciliosa Gmelin, 1789 - Pacific black duck
                           06 Anas melleri Sclater, 1865 - Meller's duck
                           07 Anas poecilorhyncha Forster, 1781 - spot-billed duck
                           08 Anas luzonica Fraser, 1839 - Philippine duck
                           09 Anas undulata Dubois, 1839 - yellow-billed duck
                           10 Anas castanea (Eyton, 1838) - chestnut-breasted teal
                           11 Anas aucklandica (Gray, 1844) - Auckland Islands teal
                           12 Anas gibberifrons Müller, 1842 - Sunda teal
                           13 Anas bernieri (Hartlaub, 1860) - Madagascan teal
                           14 Anas waigiuensis (Rothschild & Hartert, 1894) see Salvadorina waigiuensis Rothschild & Hartert, 1894
                           15 Anas crecca Linnaeus, 1758 - common teal
                           16 Anas flavirostris Vieillot, 1816 - speckled teal
                           17 Anas strepera Linnaeus, 1758 - gadwall
                           18 Anas falcata Georgi, 1775 - falcated teal
                           19 Anas formosa Georgi, 1775 - Baikal teal
                           20 Anas penelope Linnaeus, 1758 - Eurasian wigeon
                           21 Anas americana Gmelin, 1789 - American wigeon
                           22 Anas sibilatrix Poeppig, 1829 - Chiloe wigeon
                           23 Anas georgica Gmelin, 1789 - yellow-billed pintail
                           24 Anas acuta Linnaeus, 1758 - northern pintail
                           25 Anas bahamensis Linnaeus, 1758 - white-cheeked pintail
                           26 Anas erythrorhyncha Gmelin, 1789 - red-billed duck
                           27 Anas versicolor Vieillot, 1816 - silver teal
                           28 Anas punctata Burchell, 1822
                           29 Anas capensis Gmelin, 1789 - Cape teal
                           30 Anas angustirostris Ménétriès, 1832 see Marmaronetta angustirostris (Ménétriés, 1832)
                           31 Anas querquedula Linnaeus, 1758 - garganey
                           32 Anas discors Linnaeus, 1766 - blue-winged teal
                           33 Anas cyanoptera Vieillot, 1816 - cinnamon teal
                           34 Anas clypeata Linnaeus, 1758 - northern shoveler
                           35 Anas smithi Hartert, 1891 see Anas smithii (Hartert, 1891)
                           36 Anas platalea Vieillot, 1816 - red shoveler
                           37 Anas rhynchotis Latham, 1802 - Australasian shoveler