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 Mergini see Subfamily Anatinae Vigors, 1825
                         1 Genus Melanitta Boie, 1822
                         2 Genus ‡Camptorhynchus Bonaparte, 1838
                         3 Genus Histrionicus Lesson, 1828
                         4 Genus Clangula Leach, 1819
                         5 Genus Bucephala Baird, 1858
                         6 Genus Mergus Linnaeus, 1758