Phylum Chordata Bateson, 1885 - chordates
   Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
     Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
       Superorder Neognathae Pycraft, 1900 see Cohort Neognathae Pycraft, 1900
         Order Strigiformes Wagler, 1830 - owls
           Family Strigidae Vigors, 1825 - owls
             Subfamily Buboninae Vigors, 1825 - normal owls see Subfamily Striginae Vigors, 1825
               Genus Aegolius Kaup, 1829
               Genus Asio Brisson, 1760
               Genus Nesasio J.L. Peters, 1937
               Genus Pseudoscops Kaup, 1848
               Genus Strix Linnaeus, 1758