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 Aquila Brisson, 1760
                         Aquila heliaca Savigny, 1809 - imperial eagle
                           Aquila heliaca adalberti C.L. Brehm, 1861 - spanish imperial eagle see Aquila adalberti Brehm, 1861