Phylum Chordata Bateson, 1885 - chordates
   Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
     Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
       Superorder Neognathae Pycraft, 1900 see Cohort Neognathae Pycraft, 1900
         Order Anseriformes Wagler, 1831 - waterfowl and screamers
           Family Anatidae Vigors, 1825 - ducks, geese, swans
             Subfamily Anatinae Vigors, 1825 - pond ducks
               Genus Bucephala Baird, 1858
                 1 Bucephala albeola (Linnaeus, 1758) - bufflehead
                 2 Bucephala islandica (Gmelin, 1789) - Barrow's goldeneye
                 3 Bucephala clangula (Linnaeus, 1758) - common goldeneye