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 see Infraphylum Vertebrata Lamarck, 1801
             Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
               Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
                 Order Falconiformes Sharpe, 1874
                   1 Family Cathartidae Lafresnaye, 1839 - New World vultures
                   2 Family Sagittariidae Finsch & Hartlaub, 1870 - secretarybird
                   3 Family Accipitridae Vieillot, 1816 - secretary bird, osprey, kites, hawks and eagles
                   4 Family Falconidae Vigors, 1824 - falcons, caracaras