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 Strigiformes Wagler, 1830 - owls
                   Family Strigidae Vigors, 1825 - owls
                     Subfamily Buboninae Vigors, 1825 - normal owls see Subfamily Striginae Vigors, 1825
                       01 Genus Otus Pennant, 1769
                       02 Genus Jubula Bates, 1929
                       03 Genus Lophostrix Lesson, 1836
                       04 Genus Bubo Duméril, 1806
                       05 Genus Ketupa Lesson, 1830
                       06 Genus Scotopelia Bonaparte, 1850
                       07 Genus Pulsatrix Kaup, 1848
                       08 Genus Nyctea Stephens, 1826
                       09 Genus Surnia Duméril, 1805
                       10 Genus Glaucidium Boie, 1826
                       11 Genus Micrathene Coues, 1866
                       12 Genus Uroglaux Mayr, 1937
                       13 Genus Ninox Hodgson, 1837
                       14 Genus Gymnoglaux Cabanis, 1855
                       15 Genus Sceloglaux Kaup, 1848
                       16 Genus Athene Boie, 1822
                       17 Genus Speotyto Gloger, 1841 see Genus Athene Boie, 1822
                       18 Genus Ciccaba Wagler, 1832