LC
Japanese Buzzard Buteo japonicus



Taxonomy

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. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
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.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
D D D1

Red List history
Year Category Criteria
2016 Least Concern
2014 Least Concern
Species attributes

Migratory status full migrant Forest dependency Low
Land mass type Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 10,600,000 medium
Extent of Occurrence non-breeding (km2) 22,300,000 medium
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 0
Population trend Unknown not applicable -
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 - - -
Largest subpopulations - - -
Generation length (yrs) 10.1 - - -

Population justification: The global population size is unknown given recent taxonomic splits. No population information is available for the nominate race, however the oshiroi and toyoshimai races are thought to be rare (del Hoyo et al. 2015). 

Trend justification: The population trend is difficult to determine because of uncertainty over the impacts of habitat modification on population sizes.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Bangladesh N Extant Yes
Bhutan N Extant Yes
Brunei V Extant Yes
Cambodia N Extant Yes
China (mainland) N Extant Yes
Hong Kong (China) N Extant Yes
India N Extant Yes
Indonesia V Extant Yes
Japan N Extant Yes
Laos N Extant Yes
Malaysia V Extant Yes
Maldives V Extant Yes
Mongolia N Extant Yes
Myanmar N Extant Yes
Nepal N Extant Yes
North Korea N Extant Yes
Northern Mariana Islands (to USA) N Extant Yes
Pakistan N Extant Yes
Palau U Extant
Philippines V Extant Yes
Russia N Extant Yes Yes
Russia (Asian) N Extant Yes
Singapore V Extant Yes
South Korea N Extant Yes
Sri Lanka N Extant Yes
Taiwan, China N Extant Yes
Thailand N Extant Yes
Vietnam N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name

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

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Invasive and other problematic species, genes & diseases Problematic native species/diseases 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

Recommended citation
BirdLife International (2020) Species factsheet: Buteo japonicus. Downloaded from http://www.birdlife.org on 19/02/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 19/02/2020.