Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
       Parvclass Passerae see Superorder Passerimorphae Sibley et al., 1988
         Superorder Strigimorphae see Superorder Falconimorphae Seebohm, 1890
           Order Strigiformes Wagler, 1830 - owls
             Suborder Strigi see Order Strigiformes Wagler, 1830
               Parvorder Strigida see Order Strigiformes Wagler, 1830
                 Family Strigidae Vigors, 1825 - owls
                   Genus Ninox Hodgson, 1837
                     01 Ninox rufa (Gould, 1846) - rufous owl
                     02 Ninox strenua (Gould, 1838) - powerful owl
                     03 Ninox connivens (Latham, 1802) - barking owl
                     04 Ninox rudolfi A.B. Meyer, 1882 - Sumba boobook
                     05 Ninox boobook (Latham, 1802) - southern boobook
                     06 Ninox novaeseelandiae (J.F. Gmelin, 1788) - morepork
                     07 Ninox scutulata (Raffles, 1822) - brown hawk-owl
                     08 Ninox affinis Beavan, 1867 - Andaman hawk-owl
                     09 Ninox superciliaris (Vieillot, 1817) - white-browed hawk-owl
                     10 Ninox philippensis Bonaparte, 1855 - Philippine hawk-owl
                     11 Ninox ochracea (Schlegel, 1866) - ochre-bellied hawk-owl
                     12 Ninox squamipila (Bonaparte, 1850) - Moluccan hawk-owl
                     13 Ninox theomacha (Bonaparte, 1855) - jungle hawk-owl
                     14 Ninox meeki Rothschild & Hartert, 1914 - Manus hawk-owl
                     15 Ninox punctulata (Quoy & Gaimard, 1830) - speckled hawk-owl
                     16 Ninox variegata (Quoy & Gaimard, 1830) - Bismarck hawk-owl
                     17 Ninox odiosa P.L. Sclater, 1877 - russet hawk-owl
                     18 Ninox jacquinoti (Bonaparte, 1850) - Solomon Islands hawk-owl