Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
       Parvclass Passerae see Superorder Passerimorphae Sibley et al., 1988
         Superorder Passerimorphae Sibley et al., 1988
           Order Ciconiiformes Bonaparte, 1854
             Suborder Ciconii see Suborder Ciconiae Bonaparte, 1854
               Infraorder Falconides Sharpe, 1874
                 Parvorder Falconida see Superfamily Falconoidea Vigors, 1824
                   Family Falconidae Vigors, 1824 - falcons, caracaras
                     Genus Polyborus Vieillot, 1816, nom. illeg. see Genus Caracara Merrem, 1826
                       1 ‡Polyborus lutosus Ridgway, 1876 - Guadalupe caracara see Caracara lutosa (Ridgway, 1876)
                       2 Polyborus plancus (J.F. Miller, 1777) - crested caracara see Caracara plancus (Miller, 1777)