Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Neoaves Sibley et al. 1988 see Subcohort Neoaves Sibley et al., 1988
       [Order] Falconiformes Sharpe, 1874
         Family Falconidae Vigors, 1824 - falcons, caracaras
           Subfamily Falconinae Vigors, 1824 - falcons
             Genus Falco Linnaeus, 1758
               Falco columbarius Linnaeus, 1758 - merlin
                 1 Falco columbarius subaesalon Brehm, 1827
                 2 Falco columbarius aesalon Tunstall, 1771
                 3 Falco columbarius insignis (Clark, 1907)
                 4 Falco columbarius pacificus (Stegmann, 1929)
                 5 Falco columbarius pallidus (Sushkin, 1900)
                 6 Falco columbarius lymani Bangs, 1913
                 7 Falco columbarius columbarius Linnaeus, 1758
                 8 Falco columbarius suckleyi Ridgway, 1874
                 9 Falco columbarius richardsoni Ridgway, 1871