STRISORES
   \-+--Caprimulgiformes
     |    \--Caprimulgidae (Nighthawks, Nightjars)
     \-+--+--Steatornithiformes 
       |  |    \--Steatornithidae (Oilbird)
       |  \--Nyctibiiformes
       |       \--Nyctibiidae (Potoos)
       |
       \-+--Podargiformes 
         |     \--Podargidae (Frogmouths)
         |
         \-Apodiformes
             \-+--Aegothelidae (Owlet-nightjars)
               \-+--+--Hemiprocnidae (Treeswifts)
                 |  \--Apodidae (Swifts)
                 \--Trochilidae (Hummingbirds)