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 Falconiformes Sharpe, 1874
                   Family Accipitridae Vieillot, 1816 - secretary bird, osprey, kites, hawks and eagles
                     Subfamily Buteoninae Vigors - buzzards & eagles see Subfamily Accipitrinae Vieillot, 1816
                       01 Genus Geranoaëtus see Genus Geranoaetus Kaup, 1844
                       02 Genus Buteo Lacépède, 1799
                       03 Genus Parabuteo Ridgway, 1874
                       04 Genus Buteogallus Lesson, 1830
                       05 Genus Busarellus Lafresnaye, 1839
                       06 Genus Leucopternis Kaup, 1847
                       07 Genus Kaupifalco Bonaparte, 1854
                       08 Genus Butastur Hodgson, 1843
                       09 Genus Harpyhaliaëtus see Genus Harpyhaliaetus Lafresnaye, 1842
                       10 Genus Morphnus Dumont, 1816
                       11 Genus Harpia Vieillot, 1816
                       12 Genus Pithecophaga Ogilvie-Grant, 1896
                       13 Genus Harpyopsis Salvadori, 1875
                       14 Genus Oroaëtus Ridgway, 1920 see Genus Oroaetus Ridgway, 1920
                       15 Genus Spizastur Gray, 1841
                       16 Genus Spizaëtus Vieillot, 1816 see Genus Spizaetus Vieillot, 1816
                       17 Genus Lophoaëtus see Genus Lophaetus Kaup, 1847
                       18 Genus Stephanoaëtus W.L. Sclater, 1922 see Genus Stephanoaetus Sclater, 1922
                       19 Genus Polemaëtus Heine, in Heine & Reichenow, 1890 see Genus Polemaetus Heine, 1890
                       20 Genus Cassinaëtus Sclater, 1922 see Genus Spizaetus Vieillot, 1816
                       21 Genus Hieraeëtus see Genus Hieraaetus Kaup, 1844
                       22 Genus Aquila Brisson, 1760
                       23 Genus Ictinaëtus Blyth, 1843 see Genus Ictinaetus Blyth, 1843
                       24 Genus Haliaeëtus see Genus Haliaeetus Savigny, 1809
                       25 Genus Ichthyophaga Lesson, 1843