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
         01 Genus †Palaeocircus Milne-Edwards, 1869-1871[1871]
         02 Genus †Aquilavus Lambrecht, 1933
         03 Genus †Climacarthrus Ameghino, 1899
         04 Genus †Cruschedula Ameghino, 1899
         05 Genus Buteo Lacépède, 1799
         06 Genus †Palaeastur Wetmore, 1943
         07 Genus †Miohierax Howard, 1944
         08 Genus Hypomorphnus Cabanis, 1844
         09 Genus Hieraaëtus Kaup, 1844 see Genus Hieraaetus Kaup, 1844
         10 Genus Haliaeetus Savigny, 1809 - white-bellied sea-eagle
         11 Genus Aquila Brisson, 1760
         12 Genus Spizaëtus Vieillot, 1816 see Genus Spizaetus Vieillot, 1816
         13 Genus Buteogallus Lesson, 1830
         14 Genus †Calohierax Wetmore, 1937
         15 Genus †Titanohierax Wetmore, 1937
         16 Genus Morphnus Dumont, 1816
         17 Genus †Wetmoregyps L. Miller
         18 Genus †Lagopterus Moreno & Mercerat, 1891
         19 Genus †Foetopterus Moreno & Mercerat, 1891
         20 Genus Uroaëtus Kaup
         21 Genus †Necrastur De Vis, 1892
         22 Genus ‡Harpagornis Haast, 1872