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

Taxonomic source(s)
Cramp, S. and Simmons, K.E.L. (eds). 1977-1994. Handbook of the birds of Europe, the Middle East and Africa. The birds of the western Palearctic. Oxford University Press, Oxford.
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
2021	Least Concern
2018	Least Concern
2016	Least Concern
2012	Least Concern
2009	Least Concern
2008	Least Concern
2004	Least Concern
2000	Lower Risk/Least Concern
1994	Lower Risk/Least Concern
1988	Lower Risk/Least Concern

Migratory status	full migrant	Forest dependency	Does not normally occur in forest
Land mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence breeding/resident (km2)	7,990,000
Extent of Occurrence non-breeding (km2)	11,400,000
Number of locations		-
Severely Fragmented		-

	Value	Data quality	Derivation	Year of estimate
No. of mature individuals		poor	suspected	2009
Population trend	Stable		suspected	-
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		-	-	-
Percentage in largest subpopulation		-	-	-
Generation length (yrs)	7.59	-	-	-

Population justification: There is very little data on population size, but the species is apparently infrequent or rare throughout most of its range (Orta & Kirwan 2020). The global population is estimated to number > c.10,000 individuals (Ferguson-Lees et al. 2001), while national population sizes have been estimated at c.100-10,000 breeding pairs, c.50-1,000 individuals on migration and < c.50 wintering individuals in China and < c.50 individuals on migration and < c.50 wintering individuals in Korea (Brazil 2009).

Trend justification: The population may be fluctuating owing to fluctuations in vole populations (Ferguson-Lees and Christie 2001), however it is suspected to be stable in the long-term in the absence of any known significant threats.

Country/Territory	Occurrence status	Presence	Resident	Breeding	Non-breeding	Passage
Bhutan	N	Extant			Yes
China (mainland)	N	Extant	Yes		Yes	Yes
Hong Kong (China)	V	Extant
India	N	Extant	Yes		Yes
Japan	V	Extant			Yes
Kazakhstan	N	Extant	Yes		Yes
Kyrgyzstan	N	Extant			Yes	Yes
Mongolia	N	Extant	Yes			Yes
Nepal	N	Extant			Yes
North Korea	N	Extant			Yes	Yes
Russia	N	Extant	Yes
Russia (Asian)	N	Extant	Yes
Russia (Central Asian)	N	Extant	Yes
South Korea	N	Extant			Yes	Yes
Tajikistan	V	Extant
Uzbekistan	V	Extant

Country/Territory	IBA Name
Russia (Central Asian)	Dzhulukul' depression
Kazakhstan	Sorbulak Lake System
Kazakhstan	Karabas Mountains
Kazakhstan	Arkaly Mountains
Kazakhstan	Kapchagay Canyon

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Arable Land	suitable	non-breeding
Desert	Temperate	suitable	breeding
Grassland	Temperate	suitable	resident
Rocky areas (eg. inland cliffs, mountain peaks)		suitable	breeding
Altitude	0 - 5000 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Livestock farming & ranching - Small-holder grazing, ranching or farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation
Other options	Other threat	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species mortality
Pollution	Garbage & solid waste	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species mortality
Transportation & service corridors	Utility & service lines	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species mortality

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

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Recommended citation
BirdLife International (2022) Species factsheet: Buteo hemilasius. Downloaded from http://www.birdlife.org on 28/06/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 28/06/2022.