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 Otus Pennant, 1769
               Otus asio (C. Linnaeus, 1758) - eastern screech-owl
                 1 Otus asio maxwelliae (Ridgway, 1877)
                 2 Otus asio asio (Linnaeus, 1758)
                 3 Otus asio hasbroucki Ridgway, 1914
                 4 Otus asio mccallii (Cassin, 1854)
                 5 Otus asio floridanus (Ridgway, 1874)