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 Anserinae Vigors, 1825 - geese
                       Tribe Anserini Vigors, 1825 - geese see Subfamily Anserinae Vigors, 1825
                         Genus Anser Brisson, 1760
                           1 Anser anser (Linnaeus, 1758) - greylag goose
                           2 Anser erythropus (Linnaeus, 1758) - lesser white-fronted goose
                           3 Anser albifrons (Scopoli, 1769) - greater white-fronted goose
                           4 Anser fabalis (Latham, 1787) - bean goose
                           5 Anser cygnoides (Linnaeus, 1758) - swan goose
                           6 Anser indicus (Latham, 1790) - bar-headed goose
                           7 Anser caerulescens (Linnaeus, 1758) - snow goose
                           8 Anser rossii Cassin, 1861 - Ross's goose
                           9 Anser canagicus (Sevastianov, 1802) - emperor goose