Order Anseriformes Wagler, 1831 - waterfowl and screamers
   Suborder Anseres Linnaeus, 1758 - waterfowl
     Family Anatidae Vigors, 1825 - ducks, geese, swans
       Subfamily Anatinae Vigors, 1825 - pond ducks
         1 Genus Anas Linnaeus, 1758 - Pacific black duck
         2 Genus Querquedula Stephens, 1824 see Genus Anas Linnaeus, 1758
         3 Genus Nettion Kaup, 1829
         4 Genus †Eoneornis Ameghino, 1895
         5 Genus †Eutelornis Ameghino, 1895
         6 Genus Nettapus Brandt, 1836 - green pygmy-goose
         7 Genus Sarkidiornis Eyton, 1838
         8 Genus ‡Pachyanas Oliver, 1955