Cladogram of class Aves (Tetrapoda; Sauropsida), down to order level.
Struthioniformes (2)
Rheiformes (2)
Tinamiformes (47)
Apterygiformes (5)
Casuariiformes (4)
Anseriformes (164)
Galliformes (291)
Phoenicopteriformes (6)
Podicipediformes (23)
Gruiformes (165)
Charadriiformes (383)
Opisthocomiformes (1)
Caprimulgiformes (114)
Steatornithiformes (1)
Nyctibiiformes (7)
Podargiformes (14)
Aegotheliformes (11)
Apodiformes (487)
Musophagiformes (23)
Otidiformes (26)
Columbiformes (344)
Cuculiformes (141)
Mesitornithiformes (3)
Pterocliformes (16)
Phaethontiformes (3)
Eurypygiformes (2)
Gaviiformes (5)
Procellariiformes (138)
Sphenisciformes (19)
Ciconiiformes (19)
Suliformes (56)
Pelecaniformes (113)
Cathartiformes (7)
Accipitriformes (257)
Strigiformes (243)
Coliiformes (6)
Leptosomiformes (1)
Trogoniformes (39)
Bucerotiformes (63)
Coraciiformes (148)
Piciformes (445)
Cariamiformes (2)
Falconiformes (66)
Psittaciformes (370)
Passeriformes (6,264)
