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

Taxonomic note
Buteo buteo, B. japonicus and B. refectus (del Hoyo and Collar 2014) were previously lumped as B. buteo following Sibley and Monroe (1990, 1993).

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
2021	Least Concern
2016	Least Concern
2014	Least Concern
2012	Not Recognised
2008	Not Recognised
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

Migratory status	full migrant	Forest dependency	low
Land-mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	12,700,000 km2	medium
Extent of Occurrence (non-breeding)	13,400,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	unknown	-	-	-
Generation length	7.64 years	-	-	-

Population justification: Very little is known about the global population size given recent taxonomic splits. Around 85 pairs of the toyoshimai race were estimated to occur throughout the Bonin Islands in 2000 (Suzuki & Kato 2000). There is no data on population size or trends for the oshiroi race, however it is very rare and has been listed as Critically Endangered on the Red List of Threatened Species of Japan. Up to 800 pairs of the nominate race are estimated to occur in the southern Sikhote-Alin region of Primorskii Province, and more than 1,000 individuals were counted during spring migration in the valley of the lower Razdolnaya River near Ussuriysk (Shokhrin et al. 2020). 

Trend justification: Very little is known about population trends due to recent taxonomic splits and uncertainty over the impacts of habitat modification on population sizes. 

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Bangladesh	extant	vagrant			yes
Bhutan	extant	native			yes
Brunei	extant	vagrant			yes
Cambodia	extant	native			yes
China (mainland)	extant	native		yes	yes	yes
Hong Kong (China)	extant	native			yes
Indonesia	extant	vagrant			yes
Japan	extant	native	yes
Kazakhstan	extant	native				yes
Laos	extant	native			yes
Malaysia	extant	native			yes
Maldives	extant	vagrant			yes
Mongolia	extant	native		yes		yes
Myanmar	extant	native			yes
North Korea	extant	native		yes		yes
Northern Mariana Islands (to USA)	extant	vagrant		yes
Pakistan	extant	native			yes
Palau	extant	uncertain
Philippines	extant	vagrant			yes
Russia	extant	native		yes		yes
Russia (Asian)	extant	native		yes
Singapore	extant	native			yes
South Korea	extant	native			yes	yes
Taiwan, China	extant	native			yes
Thailand	extant	native			yes
Vietnam	extant	native			yes

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Arable Land	suitable	resident
Artificial/Terrestrial	Pastureland	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	suitable	non-breeding
Forest	Subtropical/Tropical Moist Montane	suitable	non-breeding
Forest	Temperate	suitable	resident
Grassland	Subtropical/Tropical Dry	suitable	passage
Shrubland	Temperate	suitable	resident
Wetlands (inland)	Bogs, Marshes, Swamps, Fens, Peatlands	suitable	resident
Wetlands (inland)	Permanent Freshwater Lakes (over 8ha)	suitable	passage
Altitude	0 - 2500 m	Occasional altitudinal limits	(max) 4500 m

Threat (level 1)	Threat (level 2)	Impact and Stresses
Biological resource use	Hunting & trapping terrestrial animals - Motivation Unknown/Unrecorded	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Problematic native species/diseases - Unspecified species	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Reduced reproductive success
Residential & commercial development	Housing & urban areas	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Reduced reproductive success
Transportation & service corridors	Utility & service lines	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species mortality

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Recommended citation
BirdLife International (2024) Species factsheet: Japanese Buzzard Buteo japonicus. Downloaded from https://datazone.birdlife.org/species/factsheet/japanese-buzzard-buteo-japonicus 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.