Nisaetus nanus

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	AVES	FALCONIFORMES	ACCIPITRIDAE

Scientific Name:

Nisaetus nanus

Species Authority:

(Wallace, 1868)

Common Name/s:

English	–	Wallace's Hawk-eagle, Wallace's Hawk-Eagle
Spanish	–	Aguila-azor de Wallace

Assessment Information [top]

Red List Category & Criteria:

Vulnerable A2c+3c+4c ver 3.1

Year Assessed:

2008

Assessor/s:

BirdLife International

Reviewer/s:

Bird, J., Butchart, S. & Crosby, M.

Contributor/s:

Aik, Y. & Davidson, G.

Justification:
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.

History:

2004	–	Vulnerable
2000	–	Vulnerable
1996	–	Vulnerable
1994	–	Vulnerable

Geographic Range [top]

Range Description:	Spizaetus nanus occurs in southern Tenasserim, Myanmar, peninsular Thailand, Peninsular and East (Sabah and Sarawak) Malaysia, Brunei, and Kalimantan and Sumatra, Indonesia. Although still widespread, it is uncommon or rare throughout its range. It may be nearing extinction in Thailand and is declining everywhere. However, its status is somewhat unclear because of the difficulties of separating it from S. alboniger.
Countries:	Native: Brunei Darussalam; Indonesia; Malaysia; Myanmar; Thailand
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	Preliminary population estimate requiring further documentation.
Population Trend:	Decreasing

Habitat and Ecology [top]

Habitat and Ecology:	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.
Systems:	Terrestrial

Threats [top]

Major Threat(s):	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 Sabah¹.

Major Threat(s):

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 Sabah¹.

Conservation Actions [top]

Conservation Actions:	Conservation Actions Underway CITES Appendix II. It occurs in numerous protected areas, including at least six (four national parks and two wildlife reserves) on Sumatra, at least three (two national parks and one wildlife reserve) in Kalimantan, at least five (one national park and four wildlife sanctuaries) in Thailand, at least three (two national parks and one wildlife reserve) in Malaysia, and one wildlife sanctuary in Myanmar. Conservation Actions Proposed Conduct extensive surveys to more clearly establish its distribution and status compared with S. alboniger. Conduct research into its ecological requirements, particularly its tolerance of habitat degradation and its ranging behaviour. Promote the concept of Forest Management Units in Sabah. Assist forest managers in habitat identification and zoning of concession areas. Afford it full legal protection under Myanmar, Thai, Indonesian and Malaysian law.

Conservation Actions:

Conservation Actions Underway
CITES Appendix II. It occurs in numerous protected areas, including at least six (four national parks and two wildlife reserves) on Sumatra, at least three (two national parks and one wildlife reserve) in Kalimantan, at least five (one national park and four wildlife sanctuaries) in Thailand, at least three (two national parks and one wildlife reserve) in Malaysia, and one wildlife sanctuary in Myanmar.

Conservation Actions Proposed
Conduct extensive surveys to more clearly establish its distribution and status compared with S. alboniger. Conduct research into its ecological requirements, particularly its tolerance of habitat degradation and its ranging behaviour. Promote the concept of Forest Management Units in Sabah. Assist forest managers in habitat identification and zoning of concession areas. Afford it full legal protection under Myanmar, Thai, Indonesian and Malaysian law.

Citation:	BirdLife International 2008. Nisaetus nanus. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 07 February 2012.
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