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 Accipitridae Vieillot, 1816 - secretary bird, osprey, kites, hawks and eagles
           Subfamily Accipitrinae Vieillot, 1816 - hawks, eagles
             Genus Buteo Lacépède, 1799
               Buteo lineatus (Gmelin, 1788) - red-shouldered hawk
                 1 Buteo lineatus lineatus (Gmelin, 1788)
                 2 Buteo lineatus alleni Ridgway, 1885
                 3 Buteo lineatus extimus Bangs, 1920
                 4 Buteo lineatus texanus Bishop, 1912
                 5 Buteo lineatus elegans Cassin, 1855