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 Asioninae
             Genus Asio Brisson, 1760
               Asio otus (C. Linnaeus, 1758) - long-eared owl
                 1 Asio otus otus (Linnaeus, 1758)
                 2 Asio otus canariensis Madarász, 1901
                 3 Asio otus tuftsi Godfrey, 1948
                 4 Asio otus wilsonianus (Lesson, 1830)