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 Ketupa Lesson, 1830
               Ketupa zeylonensis (J.F. Gmelin, 1788) - brown fish-owl
                 1 Ketupa zeylonensis semenowi Zarudny, 1905
                 2 Ketupa zeylonensis leschenaultii (Temminck, 1820)
                 3 Ketupa zeylonensis zeylonensis (Gmelin, 1788)
                 4 Ketupa zeylonensis orientalis Delacour, 1926