CORONAVES | ‘NATATORES’ \-+--Opisthocomiformes | \--Opisthocomidae (Hoatzin) | \-+--+--Otidiiformes | | \--Otididae (Bustards) | \--+--Cuculiformes | | \--Cuculidae (Cuckoos) | \--Gruiformes | \--+--+--Psophiidae (Trumpeters) | | \--+--Aramidae (Limpkin) | | \--Gruidae (Cranes) | \--+--+--Heliornithidae (Finfoots) | | \--Sarothruriade (Flufftails) | \--Rallidae (Rails, Gallinules, Coots) | \-+--Musophagiformes | \--Musophagidae (Turacos) | \-PROCELLARIIMORPHAE \-+--Gaviiformes | | \--Gaviidae (Loons) | \--+--Sphenisciformes | | \--Spheniscidae (Penguins) | \--Procellariiformes | \--+--Oceanitidae (Southern Storm Petrels) | \--+--Diomedeidae (Albatrosses) | \--+--Hydrobatidae (Northern Storm Petrels) | \--+--Procellariidae (Petrels, Shearwaters) | \--Pelecanoididae (Diving Petrels) | \-+--Ciconiiformes | \--Ciconiidae (Storks) \-+--Phalacrocoraciformes | \--+--Fregatidae (Frigatebirds) | \--+--Sulidae (Gannets, Boobies) | \--+--Anhingidae (Anhingas) | \--Phalacrocoracidae (Cormorants) \-+---Pelecaniformes | \--+--+--Scopidae (Hammerkop) | | \--Balaenicipitidae (Shoebill) | \--Pelecanidae (Pelicans) | \-Arediformes |--Threskiornithidae (Ibises, Spoonbills) \--Ardeidae (Herons, Egrets, Bitterns)