This species is suspected to be undergoing a rapid population decline owing to the widespread and on-going loss of lowland forest, which qualifies it as Vulnerable.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.
46 cm. 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. Similar spp. 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. Voice Shrill, high-pitched yik-yee or kliit-kleeik, with rising second note. Fledged juveniles give high-pitched, breathless yii-yii-yii-yii and ee-ee-ee-ee-eeee.
BirdLife International. 2001. Threatened birds of Asia: the BirdLife International Red Data Book. BirdLife International, Cambridge, U.K.
Further web sources of information
Detailed species accounts from the Threatened birds of Asia: the BirdLife International Red Data Book (BirdLife International 2001).
Text account compilers
Benstead, P., Bird, J., Davidson, P., Peet, N., Taylor, J., Tobias, J.
Aik, Y., Davison, G., Iqbal, M.
IUCN Red List evaluators
Butchart, S., Symes, A.
BirdLife International (2015) Species factsheet: Nisaetus nanus. Downloaded from http://www.birdlife.org on 29/08/2015. Recommended citation for factsheets for more than one species: BirdLife International (2015) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 29/08/2015.
This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.
To provide new information to update this factsheet or to correct any errors, please email BirdLife
To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.
Additional resources for this species
|Current IUCN Red List category||Vulnerable|
|Family||Accipitridae (Hawks, Eagles)|
|Species name author||(Wallace, 1868)|
|Population size||2500-9999 mature individuals|
|Distribution size (breeding/resident)||1,110,000 km2|
|Links to further information|
|- Additional Information on this species|