Order Accipitriformes Vieillot - diurnal birds of prey see Order Falconiformes Sharpe, 1874
   Suborder Accipitres (C. Linnaeus, 1758) - hawks
     Family Accipitridae Vieillot, 1816 - secretary bird, osprey, kites, hawks and eagles
       Subfamily Buteoninae Vigors - buzzards & eagles see Subfamily Accipitrinae Vieillot, 1816
         Genus †Palaeocircus Milne-Edwards, 1869-1871[1871]
         Genus †Aquilavus Lambrecht, 1933
         Genus †Climacarthrus Ameghino, 1899
         Genus †Cruschedula Ameghino, 1899
         Genus Buteo Lacépède, 1799
         Genus †Palaeastur Wetmore, 1943
         Genus †Miohierax Howard, 1944
         Genus Hypomorphnus Cabanis, 1844
         Genus Haliaeetus Savigny, 1809 - white-bellied sea-eagle
         Genus Aquila Brisson, 1760
         Genus Spizaëtus Vieillot, 1816 see Genus Spizaetus Vieillot, 1816
         Genus Buteogallus Lesson, 1830
         Genus †Calohierax Wetmore, 1937
         Genus †Titanohierax Wetmore, 1937
         Genus Morphnus Dumont, 1816
         Genus †Wetmoregyps L. Miller
         Genus †Lagopterus Moreno & Mercerat, 1891
         Genus †Foetopterus Moreno & Mercerat, 1891
         Genus Uroaëtus Kaup
         Genus †Necrastur De Vis, 1892
         Genus ‡Harpagornis Haast, 1872
         Genus Hieraaëtus Kaup, 1844 see Genus Hieraaetus Kaup, 1844