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