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 stygius (Wagler, 1832) - stygian owl
                 Asio stygius siguapa (d'Orbigny, 1839)