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
                       Genus Spizaëtus Vieillot, 1816 see Genus Spizaetus Vieillot, 1816
                         1 Spizaëtus ornatus (Daudin, 1800) see Spizaetus ornatus (Daudin, 1800)
                         2 Spizaëtus tyrannus (Wied, 1820) see Spizaetus tyrannus (Wied-Neuwied, 1820)
                         3 Spizaëtus nipalensis Hodgson, 1836 see Spizaetus nipalensis (Hodgson, 1836)
                         4 Spizaëtus cirrhatus (J.F. Gmelin, 1788) see Spizaetus cirrhatus (Gmelin, 1788)