Falco longipes Nilsson, Ornithologia Svecica, part I, 1817, p. 18.= Buteogallus urubitinga urubitinga J. F. Gmelin, 1788
Holotype ? : Juv., »South America». No date. Coll. Mus. Paykull. No. 136. - Measurements of type : wing : 379 mm. (primaries considerably worn at tips); tail : 255 mm.; culmen from cere : 29 mm.; tarsus : 115 mm.Click on the picture for enlargement.