|Scientific Name:||Accipiter henstii|
|Species Authority:||(Schlegel, 1873)|
|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. Lynx Edicions BirdLife International.|
|Identification information:||A large forest accipiter. Even dark grey-brown above, with slight pale supercilium and pale, heavily-barred underparts, long yellow legs and long tail. Young birds are paler brown above, often with paler feather-bases showing, and are streaked brownish underneath. Similar spp. Very similar to Madagascar Serpent Eagle Eutriorchis astur, though the adult lacks that species' overall brownish coloration and dark bars in tertials, mantle and crown-feathers. Young birds are easily distinguished by having streaks, not bars, on the underparts. Flight is generally more direct and rapid than Madagascar Serpent Eagle. Almost identical in plumage to Madagascar Sparrowhawk Accipiter madagascariensis, but much larger; differs in having throat barred and streaked, forming a chequered pattern, and in usually having bars on the undertail-coverts. Hints Often seen flying over the forest canopy calling, a loud, rapid, rather cracked "ang-ang-ang-ang-ang-ang...". Otherwise, sometimes seen briefly while chasing birds in the sub-canopy or in clearings.|
|Red List Category & Criteria:||Near Threatened ver 3.1|
|Reviewer(s):||Taylor, J. & Butchart, S.|
|Contributor(s):||Hawkins, F. & Robertson, P.|
|Facilitator/Compiler(s):||Evans, M., O'Brien, A., Robertson, P., Starkey, M., Symes, A., Taylor, J.|
This species may have a very small population, which is threatened by deforestation. It is therefore listed as Near Threatened. If the population was found to be in decline, it might qualify for a higher threat category.
|Previously published Red List assessments:||
|Range Description:||Accipiter henstii is a forest raptor sparsely distributed throughout most of Madagascar but absent from the south-west (Langrand 1990). It is rare throughout its range (Langrand 1990; Morris and Hawkins 1998), but appears to be present in almost all adequately large forest blocks that have been surveyed (ZICOMA 1999).|
|Continuing decline in area of occupancy (AOO):||Yes|
|Extreme fluctuations in area of occupancy (AOO):||No|
|Estimated extent of occurrence (EOO) - km2:||503000|
|Continuing decline in extent of occurrence (EOO):||Unknown|
|Extreme fluctuations in extent of occurrence (EOO):||No|
|Continuing decline in number of locations:||Unknown|
|Extreme fluctuations in the number of locations:||No|
|Upper elevation limit (metres):||1800|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||The population is estimated at 1,000-3,000 individuals, roughly equivalent to 670-2,000 mature individuals.
Trend Justification: The population is suspected to be in decline owing to ongoing deforestation.
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||It occurs in primary forest, both dry deciduous and humid evergreen, and in some secondary woodlands and large Eucalyptus plantations, not always near primary forest, up to 1,800 m (del Hoyo et al. 1994). It hunts below the canopy for birds and small mammals, probably including some lemurs (Langrand 1990; Morris and Hawkins 1998). Egg-laying takes place in October-November, and the nest is large and constructed from sticks in the main fork of large trees, including those in Eucalyptus plantations (del Hoyo et al. 1994).|
|Continuing decline in area, extent and/or quality of habitat:||Yes|
|Generation Length (years):||7.2|
|Movement patterns:||Not a Migrant|
|Major Threat(s):||The species is considered vulnerable to deforestation (del Hoyo et al. 1994).|
Conservation Actions Underway
CITES Appendix II. Conservation Actions Proposed
Conduct surveys to establish an up-to-date estimate of its population and range. Study the species's ecology. Monitor rates of deforestation across its range. Secure habitat through protected area status.
del Hoyo, J.; Elliott, A.; Sargatal, J. 1994. Handbook of the Birds of the World, vol. 2: New World Vultures to Guineafowl. Lynx Edicions, Barcelona, Spain.
IUCN. 2012. IUCN Red List of Threatened Species (ver. 2012.1). Available at: http://www.iucnredlist.org. (Accessed: 19 June 2012).
Langrand, O. 1990. Guide to the birds of Madagascar. Yale University Press, New Haven, USA.
Morris, P.; Hawkins, F. 1998. Birds of Madagascar: a photographic guide. Pica Press, Robertsbridge, UK.
ZICOMA. 1999. Zones d'Importance pour la Conservation des Oiseaux a Madagascar.
|Citation:||BirdLife International. 2012. Accipiter henstii. The IUCN Red List of Threatened Species 2012: e.T22695678A37905932. http://dx.doi.org/10.2305/IUCN.UK.2012-1.RLTS.T22695678A37905932.en . Downloaded on 04 October 2015.|
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