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
                       Genus Otus Pennant, 1769
                         01 Otus scops (C. Linnaeus, 1758) - common scops-owl
                         02 Otus brucei (Hume, 1872) - pallid scops-owl
                         03 Otus senegalensis (Swainson, 1837)
                         04 Otus bakkamoena Pennant, 1769 - collared scops-owl
                         05 Otus asio (C. Linnaeus, 1758) - eastern screech-owl
                         06 Otus choliba (Vieillot, 1817) - tropical screech-owl
                         07 Otus trichopsis (Wagler, 1832) - whiskered screech-owl
                         08 Otus cooperi (Ridgway, 1878)
                         09 Otus barbarus (Sclater & Salvin, 1868) - Santa Barbara screech-owl
                         10 Otus clarkii L. Kelso & E.H. Kelso, 1935 - bare-shanked screech-owl
                         11 Otus nudipes (Daudin, 1800) - Puerto Rican screech-owl
                         12 Otus albogularis (Cassin, 1849) - white-throated screech-owl
                         13 Otus brookii (Sharpe, 1892) - rajah scops-owl
                         14 Otus manadensis (Quoy & Gaimard, 1830) - Sulawesi scops-owl
                         15 Otus silvicola (Wallace, 1864) - Wallace's scops-owl
                         16 Otus beccari (Salvadori, 1875) see Otus beccarii (Salvadori, 1876)
                         17 Otus podarginus (Hartlaub & Finsch, 1872) - Palau owl see Pyrroglaux podargina (Hartlaub & Finsch, 1872)
                         18 Otus sagittatus (Cassin, 1848) - white-fronted scops-owl
                         19 Otus rufescens (Horsfield, 1821) - reddish scops-owl
                         20 Otus gurneyi (Tweeddale, 1878) - giant scops owl see Mimizuku gurneyi (Tweeddale, 1879)
                         21 Otus leucotis (Temminck, 1820) - white-faced scops-owl see Ptilopsis leucotis (Temminck, 1820)
                         22 Otus rutilus (Pucheran, 1849) - Malagasy scops-owl
                         23 Otus icterorhynchus (Shelley, 1873) - sandy scops-owl
                         24 Otus insularis (Tristram, 1880) - seychelles owl
                         25 Otus ireniae Ripley, 1966 see Otus ireneae Ripley, 1966