Harpyhaliaetus is a former genus of eagles. Recent studies have shown that the solitary eagle is closely related to the black-hawks, in particular the savanna hawk (Buteogallus meridionalis) which is smaller and browner but otherwise very similar to Harpyhaliaetus. Therefore, this genus is now merged into that of the black-hawks. It contained the following species: \n* Chaco eagle, Harpyhaliaetus coronatus \n* Solitary eagle, Harpyhaliaetus solitarius