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Aug 27 2011

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Wallaces Hawk-Eagle (Nisaetus nanus)

Wallaces Hawk-Eagle

[order] ACCIPITRIFORMES | [family] Accipitridae | [latin] Nisaetus nanus | [authority] Wallace, 1868 | [UK] Wallaces Hawk-Eagle | [FR] Aigle de Wallace | [DE] Dschungeladler | [ES] Aguila-azor de Wallace | [NL] Kleine kuifarend

Subspecies

Monotypic species

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

Small, boldly-patterned hawk-eagle. Rufescent sides of head with blackish streaks, dark crest broadly tipped white, three dark bands on tail. Buffish-white base-colour to underside flight feathers and warm buffish coverts with narrow dark barring. Blyth’s Hawk-eagle S. alboniger is larger, has narowly white-tipped crest, blackish tail with pale grey broad, central band and narrow tip. Whitish underwing with heavy black barring on coverts and dark sides of head

Listen to the sound of Wallaces Hawk-Eagle

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

Copyright remark: Most sounds derived from xeno-canto


wingspan min.: 0 cm wingspan max.: 0 cm
size min.: 43 cm size max.: 48 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 resident in evergreen forests, chiefly in the lowlands and on lower hill-slopes, but has occasionally been reported up to 1,000 m. It may tolerate some habitat degradation, having been recorded in heavily logged forest in Kalimantan and Sumatra, and logged forest in Malaysia. However, a study in Malaysia recorded it in primary forest prior to selective logging, but not subsequently

Reproduction

Only one nest ever found containing one chick.

Feeding habits

Probably hunts like congeners, prey consisting of birds, bats and lizards.

Video Wallaces Hawk-Eagle

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

copyright: Keith Blomerley


Conservation

This species is suspected to be undergoing a rapid population decline owing to widespread and ongoing loss of lowland forest, which qualifies it as Vulnerable.
The key threats are habitat loss, degradation and fragmentation as a result of large-scale commercial logging, including within protected areas, and widespread forest clearance for plantation agriculture (primarily rubber and oil-palms). Between 1985-1997, nine million and nearly seven million ha of forest were lost on Kalimantan and Sumatra, respectively. The impact of the major fires of 1997-1998 has yet to be fully assessed, but fires appear to be increasing in frequency and severity on Sumatra and Borneo. In Thailand, virtually all lowland forest has now been cleared, and encroachment continues on the lower slopes of almost all mountains. Despite these negative statistics, the species has shown resilience to at least a degree of habitat modification, even recorded within small lowland forest patches within oil palm plantations in Sabah
Wallaces Hawk-Eagle status Vulnerable

Migration

Sedentary

Distribution map

Wallaces Hawk-Eagle distribution range map

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