COLUMBEA |--+--+--Phoenicopteriformes | | \--Phoenicopteridae (Flamingos) | \--Podicipediformes | \--Podicipedidae (Grebes) | \--+--+--Mesitornithiformes | | \--Mesitornithidae (Mesites) | \--Pterocliformes | \--Pteroclidae (Sandgrouse) \--Columbiformes \--Columbidae (Doves, Pigeons)