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 Strix Linnaeus, 1758
               Strix aluco Linnaeus, 1758 - tawny owl
                 01 Strix aluco aluco Linnaeus, 1758
                 02 Strix aluco sylvatica Shaw, 1809
                 03 Strix aluco mauritanica (Witherby, 1905)
                 04 Strix aluco siberiae Dementiev, 1933
                 05 Strix aluco willkonskii (Menzbier, 1896)
                 06 Strix aluco sanctinicolai (Zarudny, 1905)
                 07 Strix aluco harmsi (Zarudny, 1911)
                 08 Strix aluco biddulphi (Scully, 1881)
                 09 Strix aluco nivicola (Blyth, 1845)
                 10 Strix aluco yamadae Yamashina, 1936
                 11 Strix aluco ma (Clark, 1907)