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 Anas Linnaeus, 1758 - Pacific black duck
                       01 Anas specularioides King, 1828 - crested duck see Lophonetta specularioides (King, 1828)
                       02 Anas specularis King, 1828 - spectacled duck see Speculanas specularis (King, 1828)
                       03 Anas capensis Gmelin, 1789 - Cape teal
                       04 Anas strepera Linnaeus, 1758 - gadwall
                       05 Anas falcata Georgi, 1775 - falcated teal
                       06 Anas penelope Linnaeus, 1758 - Eurasian wigeon
                       07 Anas americana Gmelin, 1789 - American wigeon
                       08 Anas sibilatrix Poeppig, 1829 - Chiloe wigeon
                       09 Anas sparsa Eyton, 1838 - African black duck
                       10 Anas rubripes Brewster, 1902 - American black duck
                       11 Anas fulvigula Ridgway, 1874 - mottled duck
                       12 Anas platyrhynchos Linnaeus, 1758 - mallard
                       13 Anas wyvilliana Sclater, 1878 - Hawaiian duck
                       14 Anas laysanensis Rothschild, 1892 - Laysan duck
                       15 Anas poecilorhyncha Forster, 1781 - spot-billed duck
                       16 Anas luzonica Fraser, 1839 - Philippine duck
                       17 Anas superciliosa Gmelin, 1789 - Pacific black duck
                       18 Anas undulata Dubois, 1839 - yellow-billed duck
                       19 Anas melleri Sclater, 1865 - Meller's duck
                       20 Anas discors Linnaeus, 1766 - blue-winged teal
                       21 Anas cyanoptera Vieillot, 1816 - cinnamon teal
                       22 Anas smithii (Hartert, 1891) - Cape shoveler
                       23 Anas platalea Vieillot, 1816 - red shoveler
                       24 Anas rhynchotis Latham, 1802 - Australasian shoveler
                       25 Anas clypeata Linnaeus, 1758 - northern shoveler
                       26 Anas bernieri (Hartlaub, 1860) - Madagascan teal
                       27 Anas gibberifrons Müller, 1842 - Sunda teal
                       28 Anas gracilis Buller, 1869 - grey teal
                       29 Anas castanea (Eyton, 1838) - chestnut-breasted teal
                       30 Anas aucklandica (Gray, 1844) - Auckland Islands teal
                       31 Anas bahamensis Linnaeus, 1758 - white-cheeked pintail
                       32 Anas erythrorhyncha Gmelin, 1789 - red-billed duck
                       33 Anas flavirostris Vieillot, 1816 - speckled teal
                       34 Anas acuta Linnaeus, 1758 - northern pintail
                       35 Anas eatoni (Sharpe, 1875) - Kerguelen pintail
                       36 Anas georgica Gmelin, 1789 - yellow-billed pintail
                       37 Anas querquedula Linnaeus, 1758 - garganey
                       38 Anas formosa Georgi, 1775 - Baikal teal
                       39 Anas crecca Linnaeus, 1758 - common teal
                       40 Anas puna Tschudi, 1844 - Puna teal see Anas versicolor puna Tschudi, 1844
                       41 Anas versicolor Vieillot, 1816 - silver teal
                       42 Anas hottentota (Eyton, 1838) - Hottentot teal