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 Aegolius Kaup, 1829
1 Aegolius funereus (C. Linnaeus, 1758) - boreal owl
2 Aegolius acadicus (J.F. Gmelin, 1788) - saw-whet owl
3 Aegolius ridgwayi (Alfaro, 1905)
4 Aegolius harrisii (Cassin, 1849) - buff-fronted owl