Like most birds of prey, females are larger on average than the male, with a typical size difference of 3-8%, though it can rarely range up to a 21% difference. The mountain hawk-eagle attains a total length of 69 to 84 cm and a wingspan of 134 to 175 cm ftin. The latter critically endangered island hawk-eagle seems to be of broadly similar size (weight is unknown), albeit with shorter wings, however the Flores species seems to be linearly outmatched by the largest mountain hawk-eagle. It is seemingly the largest member of the 10 currently recognized species in the genus Nisaetus, notwithstanding the recently recognized Flores hawk-eagle (Nisaetus floris) (which was separated from the changeable hawk-eagle). Although described not infrequently as "slim", it is usually perceptibly bulkier and more massive than most other members of its genus. The mountain hawk-eagle is a large raptor and fairly large eagle. Although classified currently as a least-concern species due its persistence over a rather wide distribution, this species is often quite rare and scarce and seems to be decreasing, especially in response to large-scale habitat degradation and deforestation. As is typical of hawk-eagles, the mountain hawk-eagle is a forest dwelling opportunistic predator who readily varies its prey selection between birds, mammals and reptiles along with other vertebrates. Like other Asian hawk-eagles, this species was earlier treated under the genera of Spizaetus but genetic studies have shown this group to be paraphyletic, resulting in the Old World members being placed in Nisaetus (Hodgson, 1836) and separated from the New World species. It is a confirmed breeding species in the northern part of the Indian subcontinent, from India, Nepal (hence the epithet nipalensis) through Bangladesh to Thailand, Taiwan and Japan, although its distribution could be wider still as breeding species. Its feathered tarsus marks this species as a member of the subfamily Aquilinae. Like all eagles, it is in the family Accipitridae. A less widely recognized common English name is the feather-toed eagle. The latter name is in reference to the naturalist, Brian Houghton Hodgson, who described the species after collecting one himself in the Himalayas. The mountain hawk-eagle (Nisaetus nipalensis) or Hodgson's hawk-eagle, is a large bird of prey native to Asia. Khao Yai - 1-day wildlife tour with night safari.Erawan Falls, Sai Yok NP & more - 2D/1N raft house.Erawan Falls, Hellfire Pass & historical sites.Doi Inthanon & Doi Suthep - 2-days tour.
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