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