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Austen's Brown Hornbill Anorrhinus austeni

Justification
This species is currently listed as Near Threatened because it probably has a moderately small population which is declining owing to habitat loss and hunting. Further studies are urgently required to determine rates of decline and clarify threat levels.

Taxonomic source(s)
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.

Taxonomic note
Anorrhinus tickelli (Sibley and Monroe 1990, 1993) has been split into A. tickelli and A. austeni following Rasmussen and Anderton (2005).

Distribution and population
Anorrhinus austeni occurs in China (rare; recorded in southern Xishuangbanna, south Yunnan and south-east Tibet), India (a small population resident in the hills bordering the Brahmaputra valley), Myanmar (uncommon to locally common in the west, north and east), Thailand (generally uncommon in the centre and north), Laos (historically numerous, currently widespread and locally common but declining), Vietnam (rare to uncommon in Tonkin and Annam) and Cambodia (scarce).

Population justification
The population size of this species has not been quantified, but it has been described as locally common.

Trend justification
Despite a lack of data on trends, a slow to moderate decline is suspected to be occurring as a result of habitat loss and hunting pressure.

Ecology
This species inhabits evergreen broadleaved forest in foothills up to 1,000 m in India, 1,500 m in South-East Asia and 1,800 m in China. It is omnivorous, feeding on fruits, seeds and berries as well as arthropods, molluscs and small vertebrates. Active nests have been found in April and May, and the breeding season is thought likely to last from April until July. Whilst apparently able to breed in logged and degraded forest, nesting attempts in these habitats are often unsuccessful owing to human disturbance (Datta 2009).


Threats
This species is threatened by forest loss through intensive shifting agriculture, widespread logging activities and road building, and because of high levels of hunting in many parts of its range (Datta 2009).

Conservation Actions Underway
The species occurs in protected areas, including Namdapha National Park in Arunachal Pradesh, India (Datta 2009).

Conservation Actions Proposed
Conduct surveys throughout its range in order to clarify current status. Repeat surveys and monitor populations at known sites in order to determine the magnitude of declines and rates of range contraction. Conduct ecological studies to determine habitat requirements and tolerance of secondary habitats. Assess potential risk from hunting and trapping. Grant protection to areas of suitable habitat to safeguard against logging and encroachment. Raise awareness of the species and its status in an effort to reduce hunting pressure.

References
Datta, A. 2009. Observations on Rufous-necked Aceros nipalensis and Austen's Brown Anorrhinus austeni Hornbills in Arunachal Pradesh: natural history, conservation status and threats. Indian Birds 5(4): 108-117.

del Hoyo, J.; Elliott, A.; Sargatal, J. 2001. Handbook of the Birds of the World, vol. 6: Mousebirds to Hornbills. Lynx Edicions, Barcelona, Spain.

Rasmussen, P.C.; Anderton, J.C. 2005. Birds of South Asia: the Ripley Guide. Lynx Edicions, Barcelona, Spain.

Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.

Sibley, C. G.; Monroe, B. L. 1993. A supplement to 'Distribution and taxonomy of birds of the world'. Yale University Press, New Haven, USA.

Further web sources of information
Detailed species accounts from the Threatened birds of Asia: the BirdLife International Red Data Book (BirdLife International 2001).

Explore HBW Alive for further information on this species

View photos and videos and hear sounds of this species from the Internet Bird Collection

Text account compilers
Gilroy, J., Harding, M., Khwaja, N., Taylor, J.

IUCN Red List evaluators
Butchart, S., Symes, A.

Recommended citation
BirdLife International (2014) Species factsheet: Anorrhinus austeni. Downloaded from http://www.birdlife.org on 30/08/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 30/08/2014.

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

ARKive species - Austen's brown hornbill (Anorrhinus austeni) 0

Key facts
Current IUCN Red List category Near Threatened
Family Bucerotidae (Hornbills)
Species name author Jerdon, 1872
Population size Unknown mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 1,450,000 km2
Country endemic? No
Links to further information
- Additional Information on this species