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However, according to the findings of a 2014 study, the sister relationship between larger clades of Accipitriformes was well supported (e.g. relationship of Harpagus kites to buzzards and sea eagles and these latter two with Accipiter hawks are sister taxa of the clade containing Aquilinae and Harpiinae).
The mountain hawk-eagle, Flores hawk-eagle (which is the only hawk-eagle in its small-island range) and Legge's hawk-eagle, in decreasing magnitude of size, are all are larger and bulkier than the changeable hawk-eagle whereas other Nisaetus species are smaller to varying degrees, distinctly so in the Wallace's hawk-eagle and Blyth's hawk-eagle.
The fish eagles, booted eagles, and harpy eagles have traditionally been placed in the subfamily Buteoninae together with the buzzard-hawks (buteonine hawks) and harriers. Some authors may treat these groups as tribes of the Buteoninae; Lerner & Mindell [ 26 ] proposed separating the eagle groups into their own subfamilies of Accipitridae .
The African hawk-eagle is powerfully built and hunts small to medium-sized mammals and birds predominantly, occasionally taking reptiles and other prey as well. [4] The call is a shrill kluu-kluu-kluu. [5] The African hawk-eagle is considered a fairly stable species and a species of Least Concern per the IUCN. [1]
Immature, Darién National Park This is a medium-to-large sized species of raptor but a fairly small eagle. [6] [15] In the ornate hawk-eagle, the sexes are similar in appearance and overlap in size but like most birds of prey do show reverse sexual dimorphism, in which females outsize males to the contrary of most non-raptorial birds.
Spizaetus is the typical hawk-eagle birds of prey genus found in the tropics of the Americas. It was however used to indicate a group of tropical eagles that included species occurring in southern and southeastern Asia and one representative of this genus in the rainforests of West Africa .
A Black-and-white hawk-eagle in captivity. As its name suggests, this is a black and white eagle, resembling the small typical eagles sometimes separated in "Hieraaetus". It is some 20–24 in (51–61 cm) long overall and weighs about 30 oz (850 g).
Steller's sea eagle (Haliaeetus pelagicus), also known as the Pacific sea eagle or white-shouldered eagle [citation needed], is a very large diurnal bird of prey in the family Accipitridae. It was described first by Peter Simon Pallas in 1811.