VU
Henst's Goshawk Accipiter henstii



Taxonomy

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- C2a(ii) C2a(i); D1

Red List history
Year Category Criteria
2020 Vulnerable C2a(i); D1
2016 Near Threatened C1+2a(i); D1
2012 Near Threatened C1+2a(i)
2008 Near Threatened A3c; C1; C2a(i)
2004 Near Threatened
2000 Lower Risk/Near Threatened
1994 Lower Risk/Near Threatened
1988 Near Threatened
Species attributes

Migratory status not a migrant Forest dependency High
Land mass type Land-mass type - shelf island
Average mass -
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 673,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 500-999 medium estimated 2020
Population trend Decreasing inferred -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations 2-100 - - -
Percentage in largest subpopulation 1-89 - - -
Generation length (yrs) 7.9 - - -

Population justification: The population was estimated in 2016 to be 1,000-2,250 individuals (R. Thorstrom in litt. 2016), which was roughly equivalent to 670-1,500 mature individuals. It is now estimated that there are fewer than 1,000 mature individuals (L. Rene de Roland in litt. 2020). The global population is therefore placed in the band of 500-999 mature individuals. The subpopulation structure is not known, but given the species's wide range and fragmented habitat, it is assumed that there are multiple subpopulations and that fewer than 89% of mature individuals are found in a single subpopulation.

Trend justification: The population is inferred to be in decline owing to ongoing deforestation. An analysis of remote-sensed data on deforestation between 2000 and 2012 (Tracewski et al. 2016) estimated a rate of forest loss of 10% over three generations for this species.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Madagascar N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Madagascar Montagne d'Ambre National Park and Special Reserve
Madagascar Analamerana Special Reserve
Madagascar Andavakoera Classified Forest NAP
Madagascar Daraina Forest
Madagascar Tsaratanana Strict Nature Reserve and extension
Madagascar South Anjanaharibe Special Reserve and extension
Madagascar Marojejy National Park
Madagascar Masoala National Park
Madagascar Ankarafantsika National Park and Ampijoroa
Madagascar Marotandrano Special Reserve
Madagascar Kasijy Special Reserve
Madagascar Tsingy de Bemaraha National Park and Strict Nature Reserve
Madagascar Manambolomaty wetland complex and Tsimembo Classified Forest
Madagascar Upper Rantabe Classified Forest
Madagascar Ambatovaky Special Reserve
Madagascar Bezavona Classified Forest
Madagascar Zahamena National Park and Strict Reserve
Madagascar Betampona Strict Nature Reserve
Madagascar Sihanaka Forest
Madagascar Mantadia National Park and Analamazaotra Special Reserve
Madagascar Onive Classified Forest
Madagascar Menabe forest complex
Madagascar Kirindy Mite National Park and extension
Madagascar Mangoky-Ankazoabo Complex NPA
Madagascar Zombitse-Vohibasia National Park and extension
Madagascar Analavelona NPA
Madagascar Andohahela National Park - Section I
Madagascar Ranomafana National Park and extension
Madagascar Andringitra National Park
Madagascar Parc National d'Isalo
Madagascar Vondrozo Classified Forest NPA
Madagascar Ankeniheny Zahamena Corridor NPA (CAZ)
Madagascar Makira Natural Park
Madagascar Kirindy-South Forest
Madagascar Mangoky-Ankazoabo Complex NPA

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Plantations suitable resident
Forest Subtropical/Tropical Dry major resident
Forest Subtropical/Tropical Moist Lowland major resident
Forest Subtropical/Tropical Moist Montane suitable resident
Savanna Dry suitable resident
Altitude 0 - 1800 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Small-holder farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting - Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Pets/display animals, horticulture - - International Non-trivial Recent

Recommended citation
BirdLife International (2021) Species factsheet: Accipiter henstii. Downloaded from http://www.birdlife.org on 01/12/2021. Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 01/12/2021.