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 Micrathene Coues, 1866 [monotypic]
Micrathene whitneyi (J.G. Cooper, 1861) - elf owl
1 Micrathene whitneyi whitneyi (Cooper, 1861)
2 Micrathene whitneyi idonea (Ridgway, 1914)
3 Micrathene whitneyi sanfordi (Ridgway, 1914)
4 Micrathene whitneyi graysoni Ridgway, 1886