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 Bubo Duméril, 1806
               Bubo virginianus (J.F. Gmelin, 1788) - great horned owl
                 01 Bubo virginianus lagophonus (Oberholser, 1904)
                 02 Bubo virginianus saturatus Ridgway, 1877
                 03 Bubo virginianus pacificus Cassin, 1854
                 04 Bubo virginianus subarcticus Hoy, 1853
                 05 Bubo virginianus pallescens Stone, 1897
                 06 Bubo virginianus heterocnemis (Oberholser, 1904)
                 07 Bubo virginianus virginianus (Gmelin, 1788)
                 08 Bubo virginianus elachistus Brewster, 1902
                 09 Bubo virginianus mayensis Nelson, 1901
                 10 Bubo virginianus mesembrinus (Oberholser, 1904)
                 11 Bubo virginianus nigrescens Berlepsch, 1884
                 12 Bubo virginianus nacurutu (Vieillot, 1817)
                 13 Bubo virginianus magellanicus (Gmelin, 1788)