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 Elaninae Blyth - smooth-clawed kites see Subfamily Accipitrinae Vieillot, 1816
                       1 Genus Elanus Savigny, 1809
                       2 Genus Chelictinia Lesson, 1843
                       3 Genus Machaerhamphus Westerman, 1851 see Genus Macheiramphus Bonaparte, 1850
                       4 Genus Gampsonyx Vigors, 1825
                       5 Genus Elanoides Vieillot, 1818