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Aug 27 2011

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Blyths Hawk-Eagle (Nisaetus alboniger)

Blyths Hawk-Eagle

[order] ACCIPITRIFORMES | [family] Accipitridae | [latin] Nisaetus alboniger | [authority] Blyth, 1845 | [UK] Blyths Hawk-Eagle | [FR] Aigle de Blyth | [DE] Traueradler | [ES] Aguila-azor Indonesia | [NL] Blyths Kuifarend

Subspecies

Genus Species subspecies Region Range
Nisaetus alboniger OR Malay Peninsula, Sumatra, Borneo

Genus

Nisaetus is a genus of eagles found mainly in tropical Asia. They were earlier placed within the genus Spizaetus but molecular studies show that the Old World representatives were closer to the genus Ictinaetus than to the New World Spizaetus (in the stricter sense). They are slender bodied, medium sized hawk-eagles with rounded wings, long feathered legs, barred wings, crests and usually adapted to forest habitats

Physical charateristics

It is a medium-sized raptor at about 51-58 cm in length. Adult has a thick white band on uppertail and undertail, all black above, black spotted breast, barred below. It has a prominent crest like the bazas. Juvenile is dark brown above, and has a light brown head and underparts.

Listen to the sound of Blyths Hawk-Eagle

[audio:http://www.planetofbirds.com/MASTER/ACCIPITRIFORMES/Accipitridae/sounds/Blyths Hawk-Eagle.mp3]

Copyright remark: Most sounds derived from xeno-canto


wingspan min.: 0 cm wingspan max.: 0 cm
size min.: 52 cm size max.: 58 cm
incubation min.: 0 days incubation max.: 0 days
fledging min.: 0 days fledging max.: 0 days
broods: 0   eggs min.: 0  
      eggs max.: 0  

Range

Oriental Region : Malay Peninsula, Sumatra, Borneo

Habitat

It is a bird of hilly and montane forest, although island forms prefer a higher tree density. Found from 200m to 1700m.

Reproduction

It builds a stick nest in a tree and lays a single egg. Only a few nest are found, in one of them incubation started in november, young fledged in february.

Feeding habits

A number of forest dwellers mammals, birds, lizards and bats. Hunts by flight with take off from a concealed perch. Catches prey in flight.

Video Blyths Hawk-Eagle

httpv://www.youtube.com/watch?v=FRnZS9jiRTw

copyright: Khong Tuck Khoon


Conservation

This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). Despite the fact that the population trend appears to be decreasing, the decline is not believed to be sufficiently rapid to approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size may be small, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
Blyths Hawk-Eagle status Least Concern

Migration

Unknown, but probably non-migratory

Distribution map

Blyths Hawk-Eagle distribution range map

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