Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
       Parvclass Passerae see Superorder Passerimorphae Sibley et al., 1988
         Superorder Passerimorphae Sibley et al., 1988
           Order Ciconiiformes Bonaparte, 1854
             Suborder Ciconii see Suborder Ciconiae Bonaparte, 1854
               Infraorder Falconides Sharpe, 1874
                 Parvorder Accipitrida see Superfamily Accipitroidea Vieillot, 1816
                   Family Accipitridae Vieillot, 1816 - secretary bird, osprey, kites, hawks and eagles
                     Subfamily Accipitrinae Vieillot, 1816 - hawks, eagles
                       Genus Spilornis Gray, 1840
                         1 Spilornis cheela (Latham, 1790) - crested serpent-eagle
                         2 Spilornis minimus Hume, 1873 - Nicobar serpent-eagle see Spilornis cheela minimus Hume, 1873
                         3 Spilornis kinabaluensis Sclater, 1919 - mountain serpent-eagle
                         4 Spilornis rufipectus Gould, 1858 - Sulawesi serpent-eagle
                         5 Spilornis holospilus (Vigors, 1830) - Philippine serpent-eagle see Spilornis cheela holospilus (Vigors, 1831)
                         6 Spilornis elgini (Blyth, 1863) - Andaman serpent-eagle