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
Aegolius funereus (C. Linnaeus, 1758) - boreal owl
1 Aegolius funereus richardsoni (Bonaparte, 1838)
2 Aegolius funereus funereus (Linnaeus, 1758)
3 Aegolius funereus magnus (Buturlin, 1907)
4 Aegolius funereus sibiricus (Buturlin, 1910)
5 Aegolius funereus pallens (Schalow, 1908)
6 Aegolius funereus caucasicus (Buturlin, 1907)
7 Aegolius funereus beickianus Stresemann, 1928