Strigiformes
Phylum: Chordata
Subphylum: Vertebrata
Class: Aves
Subclass: Neornithes (2,057 genera / 9,672 species)
Infraclass: Eoaves
Parvclass: Passerae
Superorder: Strigimorphae
Order: Strigiformes (45/291 – barn and grass owls, typical owls, owlet-nightjars, frogmouths, oilbird, potoos, eared-nightjars, nighthawks, nightjars)
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Suborder: Strigi
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Parvorder: Tytonida
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Family: Tytonidae (2/17 – barn owls, grass owls)
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Family: Strigidae (23/161 – typical owls)
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Family: Aegothelidae (1/8 – owlet-nightjars)
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Infraorder: Podargides
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Family: Podargidae (1/3 – Australian frogmouths)
Family: Batrachostomidae (1/11 – Asian frogmouths)
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Parvorder: Steatornithida
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Superfamily: Steatornithoidea
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Family: Steatornithidae (1/1 – oilbird)
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Family: Nyctibiidae (1/7 – potoos)
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Superfamily: Eurostopodoidea
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Family: Eurostopodidae (1/7 – eared-nightjars)
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Family: Caprimulgidae (14/76)
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Subfamily: Chordeilinae (nighthawks)
Subfamily: Caprimulginae (nightjars)
