Species
- Eurasian Pygmy Owl, Glaucidium passerinum
- Collared Owlet, Glaucidium brodiei
- Pearl-spotted Owlet, Glaucidium perlatum
- Northern Pygmy Owl, Glaucidium (gnoma) californicum
- Mountain Pygmy Owl, Glaucidium gnoma gnoma
- Guatemalan Pygmy Owl, Glaucidium (gnoma) cobanense
- Cape Pygmy Owl, Glaucidium (gnoma) hoskinsii
- Costa Rican Pygmy Owl, Glaucidium costaricanum
- Cloud-forest Pygmy Owl, Glaucidium nubicola
- Andean Pygmy Owl, Glaucidium jardinii
- Yungas Pygmy Owl, Glaucidium bolivianum
- Colima Pygmy Owl, Glaucidium palmarum
- Tamaulipas Pygmy Owl, Glaucidium sanchezi
- Central American Pygmy Owl, Glaucidium griseiceps
- Subtropical Pygmy Owl, Glaucidium parkeri
- Amazonian Pygmy Owl, Glaucidium hardyi
- Pernambuco Pygmy Owl, Glaucidium mooreorum
- East Brazilian Pygmy Owl, Glaucidium minutissimum
- Ferruginous Pygmy Owl, Glaucidium brasilianum
- Ridgway's Pygmy Owl, Glaucidium (brasilianum) ridgwayi (species or subspecies)
- Tucuman Pygmy Owl, Glaucidium (brasilianum) tucumanum (species or subspecies)
- Pacific Pygmy Owl, Glaucidium peruanum
- Austral Pygmy Owl, Glaucidium nanum
- Cuban Pygmy Owl, Glaucidium siju
- Red-chested Owlet, Glaucidium tephronotum
- Sjostedt's Barred Owlet, Glaucidium sjostedti
- Asian Barred Owlet, Glaucidium cuculoides
- Javan Owlet, Glaucidium castanopterum
- Jungle Owlet, Glaucidium radiatum
- Chestnut-backed Owlet, Glaucidium castanonotum
- African Barred Owlet, Glaucidium capense
- Ngami Owlet, Glaucidium (capense) ngamiense
- Scheffler's Owlet, Glaucidium (capense) scheffleri
- Albertine Owlet, Glaucidium albertinum
- Chestnut Owlet, Glaucidium castaneum
The supposed prehistoric species "Glaucidium" dickinsoni is now recognized as a burrowing owl, probably a paleosubspecies providentiae. Bones of an indeterminate Glaucidium have been recovered from Late Pliocene deposits in Poland (Mlíkovský 2002).
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