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