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Nisaetus, the crested hawk-eagles, is a genus of raptor in the subfamily Aquilinae, found mainly in tropical Asia. They were earlier placed within the genus Spizaetus but molecular studies show that the Old World representatives of that genus are closer to the genus Ictinaetus than to the New World Spizaetus ( in the stricter sense ).
Only two species of the genus Nisaetus are outside the changeable hawk-eagle's normal distribution (including their own former subspecies, the Flores hawk-eagle). [1] In range with most other Nisaetus species (such as the islands or mainland of southeast Asia), the changeable hawk-eagle is more likely to be almost crestless. Other species tend ...
In the 1990s, the Japanese population was estimated at 900–1,000 total individuals and may have reduced even more so today from that figure. [ 1 ] [ 6 ] [ 13 ] [ 102 ] [ 103 ] As the species is a K-strategist like all eagles, it was feared that the ongoing population reduction of N. n. orientalis might lead to loss of genetic diversity, and ...
The Javan hawk-eagle (Nisaetus bartelsi) is a medium-sized, dark brown raptor in the family Accipitridae. It is the national bird of Indonesia , where it is commonly referred to as the real-life model for the Garuda Pancasila , which is also inspired by Garuda ; a bird-like deity in Hinduism and Buddhism .
The Flores hawk-eagle (Nisaetus floris) is a large raptor in the family Accipitridae.It is an endemic species to the Lesser Sunda Islands in Indonesia. [2] A member of the genus Nisaetus, it was considered as a subspecies of and conspecific with the changeable hawk-eagle but genetic studies have evidenced it as a legitimate species. [3]
Wallace's hawk-eagle (Nisaetus nanus) is a species of bird of prey in the family Accipitridae. It is found in Kra Isthmus , Malay Peninsula , Sumatra and Borneo . Its natural habitat is subtropical or tropical moist lowland forests .
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Blyth's hawk-eagle (Nisaetus alboniger) (earlier treated as Spizaetus) [2] is a medium-sized bird of prey. Like all eagles, it is in the family Accipitridae. It can be found in the Malay Peninsula, Singapore, Sumatra and Borneo. [3] It is a bird of open woodland, although island forms prefer a higher tree density.