METAVES
|--‘COLUMBIMORPHAE’
| \--+--Opisthocomiformes
| | \--Opisthocomidae (Hoatzin)
| |
| |--Columbiformes
| | |--Pteroclidae (Sandgrouse)
| | \--Columbidae (Doves, Pigeons)
| |
| \--+--Eurypygiformes
| | |--Rhynochetidae (Kagu)
| | \--Eurypygidae (Sunbittern)
| |
| \--Phoenicopteriformes
| |--Phaethontidae (Tropicbirds)
| \--+--Mesitornithidae (Mesites)
| \--+--Phoenicopteridae (Flamingos)
| \--Podicipedidae (Grebes)
|
\--CYPSELOMORPHAE
|--Steatornithiformes
| \-- Steatornithidae (Oilbird)
|--Podargiformes
| \-- Podargidae (Frogmouths)
\--+--Caprimulgiformes
| |--Nyctibiidae (Potoos)
| \--Caprimulgidae (Nighthawks, Nightjars)
\--Apodiformes
\--+--Aegothelidae (Owlet-Nightjars)
|--+--Apodidae (Swifts)
| \--Hemiprocnidae (Treeswifts)
\--Trochilidae (Hummingbirds)