Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Neoaves Sibley et al. 1988 see Subcohort Neoaves Sibley et al., 1988
       [Order] Strigiformes Wagler, 1830 - owls
         Family Strigidae Vigors, 1825 - owls
           Subfamily Striginae Vigors, 1825 - strange-eared owls
             Genus Otus Pennant, 1769
               Otus bakkamoena Pennant, 1769 - collared scops-owl
                 01 Otus bakkamoena deserticolor Ticehurst, 1922
                 02 Otus bakkamoena plumipes (Hume, 1870)
                 03 Otus bakkamoena lettia (Hodgson, 1836)
                 04 Otus bakkamoena gangeticus Ticehurst, 1922
                 05 Otus bakkamoena marathae Ticehurst, 1922
                 06 Otus bakkamoena bakkamoena Pennant, 1769 - Indian scops-owl
                 07 Otus bakkamoena ussuriensis (Buturlin, 1910)
                 08 Otus bakkamoena semitorques Temminck & Schlegel, 1844 - Japanese scops-owl
                 09 Otus bakkamoena pryeri (Gurney, 1889)
                 10 Otus bakkamoena erythrocampe (Swinhoe, 1874)
                 11 Otus bakkamoena glabripes (Swinhoe, 1870)
                 12 Otus bakkamoena umbratilis (Swinhoe, 1870)
                 13 Otus bakkamoena condorensis Kloss, 1930
                 14 Otus bakkamoena lempiji (Horsfield, 1821) - collared scops-owl
                 15 Otus bakkamoena kangeanus Mayr, 1938