Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Galloanserae Sibley, Ahlquist & Monroe Jr., 1988 see Subcohort Galloanserae Sibley, Ahlquist & Monroe Jr., 1988
       [Order] Anseriformes Wagler, 1831 - waterfowl and screamers
         Family Anatidae Vigors, 1825 - ducks, geese, swans
           Subfamily Tadorninae Reichenbach - sheldrakes
             01 Genus Hymenolaimus Gray, 1843 [monotypic]
             02 Genus Tachyeres Owen, 1875
             03 Genus Merganetta Gould, 1842 [monotypic]
             04 Genus Plectropterus Stephens, 1824 [monotypic]
             05 Genus Sarkidiornis Eyton, 1838 [monotypic]
             06 Genus Cyanochen Bonaparte, 1856 [monotypic]
             07 Genus Alopochen Stejneger, 1885 [monotypic]
             08 Genus Neochen Oberholser, 1918 [monotypic]
             09 Genus Chloephaga Eyton, 1838
             10 Genus Tadorna Boie, 1822