Classification of Livezey and Zusi 2007
Unr. Avialae Gauthier 1986 [avialan]
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Infracl. Aves Linnaeus 1758 [bird]
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Unr. Neornithes Gadow 1893
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Unr. Neognathae Pycraft 1900
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Unr. Galloanserae Sibley and Ahlquist 1990
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Superor. Galloanserimorphae
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Or. Anseriformes Wagler 1831 [waterfowl]
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Subor. Anseres Linnaeus 1758
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Invalid names: Anatoidea Leach 1820 [empty], Anseranatoidea Sclater 1880 [empty]
Invalid names: Anserimorphae [invalid subgroup]
Unr. Neoaves Sibley 1988
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Unr. Natatores Baird 1858
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Unr. Pygopodotubinares Livezey and Zusi 2007
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Superor. Gaviomorphae Livezey and Zusi 2007
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Superor. Procellariimorphae
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Unr. Steganograllatores Livezey and Zusi 2007
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Superor. Ciconiimorphae
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Or. Ardeiformes Wagler 1831
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Fm. Ardeidae Leach 1820 [heron]
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Invalid names: Cochleariidae Ridgway 1887 [empty]
Or. Ciconiiformes Bonaparte 1854
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Subor. Ciconiae
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Superfm. Threskiornithoidea Lambrecht 1933
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Fm. Plataleidae Bonaparte 1838 [spoonbill]
Fm. Threskiornithidae Richmond 1917 [ibis]
Invalid names: Ciconioidea [empty]
Invalid names: Scopi [empty]
Superor. Pelecanimorphae Huxley 1867
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Or. Balaenicipitiformes Sclater 1924 [schoebill]
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Or. Pelecaniformes Sharpe 1891
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Subor. †Steganopodes
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Infraor. Pelecanides
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Invalid names: Pelecanida [empty]
Unr. Terrestrornithes Livezey and Zusi 2007
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Unr. Dendrornithes
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Unr. Anomalogonates Garrod 1874
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Unr. Coccyges Huxley 1867
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Superor. Cuculimorphae Sibley 1988
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Or. Opisthocomiformes L'Herminier 1837
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Superor. Psittacimorphae
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Or. Columbiformes Latham 1790 [dove]
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Invalid names: Pterocletes [empty]
Or. Psittaciformes Wagler 1830 [parrot]
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Fm. Cacatuidae Gray 1840 [cockatoo]
Fm. Loriinidae Selby 1836
Fm. Psittacidae Illiger 1811 [parrot]
Invalid names: Nestoridae [empty]
Unr. Incessores Baird 1858
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Superor. Cypselomorphae Huxley 1867
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Or. Apodiformes Peters 1940 [swift]
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Subor. †Apodi
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Fm. Apodidae Hartert 1897 [swift]
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Subfm. Apodinae Hartert 1897
Invalid names: Cypselinae Bonaparte 1838 [empty]
Fm. Trochilidae Vigors 1825 [hummingbird]
Invalid names: Hemiprocni Livezey and Zusi 2007 [empty]
Or. Caprimulgiformes Ridgway 1881 [nightjar]
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Subor. Caprimulgi Ridgway 1888
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Fm. Caprimulgidae Vigors 1825
Fm. Nyctibiidae Chenu and des Murs 1851
Fm. Podargidae Gray 1847 [frogmouth]
Invalid names: Aegotheli Sibley 1988 [empty]
Unr. Picoclamatores Livezey and Zusi 2007
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Superor. Passerimorphae Sibley 1988
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Or. Coraciiformes Forbes 1884
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Subor. Bucerotes Fürbringer 1888
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Infraor. Upupides
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Fm. Phoeniculidae Sclater 1924
Fm. Upupidae Bonaparte 1831
Invalid names: Upupiformes [invalid subgroup]
Invalid names: Bucerotides [empty]
Subor. Coracii Wetmore and Miller 1926
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Infraor. Coraciides
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Fm. Brachypteraciidae Bonaparte 1854 [ground roller]
Invalid names: Coracioidea [empty], Leptosomatoidea [empty]
Invalid names: Meropides [empty]
Or. Passeriformes Linnaeus 1758 [perching bird]
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Subor. Passeres Linnaeus 1758
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Infraor. Tyrannides Sibley 1988
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Fm. Pittidae Swainson 1831
Fm. Tyrannidae Vigors 1825 [tyrant flycatcher]
Or. Piciformes Meyer and Wolf 1810
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Subor. Pici Linnaeus 1758
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Superfm. Capitonoidea
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Invalid names: Capitonidae Bonaparte 1840 [empty], Rhamphastidae Vigors 1825 [empty]
Invalid names: Picoidea [empty]
Unr. Trogones Livezey and Zusi 2007
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Unr. Raptores Baird 1858
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Superor. Falconimorphae
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Or. Falconiformes Sharpe 1874 [raptor]
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Subor. Accipitres Linnaeus 1758
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Subor. Cathartae
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Fm. Cathartidae Lafresnaye 1839 [New World vulture]
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Invalid names: Vulturidae Illiger 1811 [synonym]
Invalid names: Teratornithi [empty]
Or. Strigiformes Wagler 1830 [owl]
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Fm. Strigidae Vigors 1825 [true owl]
Unr. Telmatorae
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Superor. Charadriimorphae Huxley 1867
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Or. Charadriiformes Huxley 1867 [shorebird]
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Subor. Lari Sharpe 1891
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Infraor. Larides
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Superfm. Laroidea Stejneger 1885
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Fm. Laridae Vigors 1825 [gull]
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Subfm. Larinae Bonaparte 1831
Subfm. Sterninae Bonaparte 1838 [tern]
Fm. Stercorariidae Brisson 1760 [skua]
Invalid names: Alcides [empty]
Subor. Limicolae
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Infraor. Charadriides
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Invalid names: Burhinoidea [empty], Glareoloidea [empty], Haematopoidea [empty]
Invalid names: Pedionomae [empty]
Or. Gruiformes Bonaparte 1854
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Subor. Cariamae Fürbringer 1888
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Infraor. Cariamides
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Superfm. Cariamoidea
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Fm. †Bathornithidae Wetmore 1927
Fm. Cariamidae Bonaparte 1853 [seriema]
Fm. †Phorusrhacidae Ameghino 1889 [terror bird]
Invalid names: Otides Sibley 1988 [empty]
Subor. Eurypygae
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Infraor. Rhynochetides Sharpe 1891
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Fm. Apterornithidae Bonaparte 1856
Fm. Rhynochetidae Newton 1868
Invalid names: Turniciformes Sibley and Ahlquist 1990 [empty]
Superor. Palaeognathae Pycraft 1900
Unr. †Palaeoaves Livezey and Zusi 2007
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Superor. †Euenantiornithes Chiappe 2002
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Or. †Apsaraviformes Livezey and Zusi 2007
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Invalid names: Apsaravidae Livezey and Zusi 2007 [empty]
Or. †Rahonaviformes Livezey and Zusi 2007
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Invalid names: Rahonavidae Livezey and Zusi 2007 [empty]
Superfm. Gruioidea Stejneger 1885
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Fm. Aramidae Bonaparte 1854 [limpkin]
Fm. Gruidae Vigors 1825 [crane]
Superor. Palaeognathae Pycraft 1900
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Unr. Ratitae Merrem 1813
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Superor. Apterygimorphae
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Superor. Casuariimorphae Livezey and Zusi 2007
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Or. Casuariiformes [cassowary]
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Fm. Casuariidae Kaup 1847
Invalid names: Dromaiidae Richmond 1908 [empty]
Invalid names: Struthionimorphae Livezey and Zusi 2007 [empty]
Superfm. Procellaroidea Stejneger 1885
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Fm. Diomedeidae Gray 1840 [albatross]
Fm. Procellariidae Vigors 1825 [petrel]
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Invalid names: Pachyptilinae [empty], Procellariinae [empty]