• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2018	Near Threatened	C1
2016	Near Threatened	C1
2012	Near Threatened	C1
2008	Near Threatened	C1
2005	Near Threatened
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

Migratory status	not a migrant	Forest dependency	high
Land-mass type	continent	Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	1,650,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	poor	suspected	2000-2033
Rate of change over the past 10 years/3 generations (longer of the two periods)	1-19%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	1-19%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	1-19%	-	-	-
Generation length	11.1 years	-	-	-

Population justification: The population size of this species has not been quantified, but it is generally scarce or rare across most of its range, and only locally common at a handful of sites (Poonswad et al. 2013).

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.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Cambodia	extant	native		yes
China (mainland)	extant	native		yes
India	extant	native		yes
Laos	extant	native		yes
Myanmar	extant	native		yes
Thailand	extant	native		yes
Vietnam	extant	native		yes

Country/Territory	IBA Name
Cambodia	Kirirom
Laos	Dong Ampham
Laos	Eastern Bolikhamxay Mountains
Laos	Hin Namno
Laos	Nakai Plateau
Laos	Nakai-Nam Theun
Laos	Phou Dendin
Laos	Upper Xe Kaman
Thailand	Huai Kha Khaeng
Thailand	Kaeng Krachan
Thailand	Thung Yai - Naresuan
Thailand	Umphang
Vietnam	Ban Bung
Vietnam	Cuc Phuong
Vietnam	Ke Go
Vietnam	Kon Cha Rang
Vietnam	Kon Ka Kinh
Vietnam	Kon Plong
Vietnam	Ngoc Linh
Vietnam	Pu Mat
Vietnam	Vu Quang

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Moist Montane	suitable	resident
Altitude	0 - 1800 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Shifting agriculture	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Hunting & trapping terrestrial animals - Intentional use (species is the target)	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Species disturbance, Species mortality
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation
Transportation & service corridors	Roads & railroads	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Causing/Could cause fluctuations		Low Impact: 5
		Stresses Indirect ecosystem effects, Ecosystem degradation, Ecosystem conversion

Purpose	Scale
Food - human	subsistence, national
Pets/display animals, horticulture	international

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Recommended citation
BirdLife International (2024) Species factsheet: Austen's Brown Hornbill Anorrhinus austeni. Downloaded from https://datazone.birdlife.org/species/factsheet/austens-brown-hornbill-anorrhinus-austeni on 22/11/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 22/11/2024.