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 Surniinae del Hoyo et al., 2014
             Genus Surnia Duméril, 1805 [monotypic]
               Surnia ulula (C. Linnaeus, 1758) - northern hawk owl
                 1 Surnia ulula ulula (Linnaeus, 1758)
                 2 Surnia ulula tianschanica Smallbones, 1906
                 3 Surnia ulula caparoch (Statius Müller, 1776)