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This sexual difference in size is most pronounced in active species that hunt birds, such as the Accipiter hawks, in which the size difference averages 25–50%. In a majority of species, such as generalist hunters and rodent -, reptile -, fish -, and insect -hunting specialists, the dimorphism is less, usually between a 5% to 30% size difference.
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.
Despite the differences between the Bonelli's eagle and the African hawk-eagle the two species are visibly similar and are still considered sister species. [ 5 ] [ 8 ] Recent DNA research has resulted in the two species being moved, in 2014, [ 9 ] to the genus Aquila from Hieraaetus , along with a third possibly related species, the Cassin's ...
The Accipitriformes (/ æ k ˌ s ɪ p ɪ t r ɪ ˈ f ɔːr m iː z /; from Latin accipiter 'hawk' and formes 'having the form of') are an order of birds that includes most of the diurnal birds of prey, including hawks, eagles, vultures, and kites, but not falcons.
Eagle is the common name for the golden eagle, bald eagle, and other birds of prey in the family of the Accipitridae. Eagles belong to several groups of genera , some of which are closely related. True eagles comprise the genus Aquila .
More surprisingly, the smaller, much paler-bellied species pair Bonelli's eagle (A. fasciatus) and African hawk-eagle (A. spilogaster), previously included in the genus Hieraaetus, have been revealed to be genetically much closer to the Verreaux's and golden eagle lineage than to other species traditionally included in the genus Aquila. [4] [5] [2]
3D scan of skeleton. Aquila is the genus of true eagles.The genus name is Latin for "eagle", possibly derived from aquilus, "dark in colour". [1] It is often united with the sea eagles, buteos, and other more heavyset Accipitridae, but more recently they appear to be less distinct from the slenderer accipitrine hawks than previously believed.
[7] [84] However, the size difference is extreme between the wedge-tailed and little eagles, with the earlier over four times heavier than the latter, and the little eagle as expected exploits a lower trophic level relative to its more powerful competitor.