Data Zone
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.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2021 | Least Concern | |
| 2016 | Least Concern | |
| 2014 | Least Concern |
| Migratory status | full migrant | Forest dependency | Low |
| Land mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 12,700,000 | medium |
| Extent of Occurrence non-breeding (km2) | 13,400,000 | medium |
| Number of locations | - | |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | unknown | 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 | - | - | - | |
| Percentage in largest subpopulation | - | - | - | |
| Generation length (yrs) | 7.64 | - | - | - |
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 | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Bangladesh | V | Extant | Yes | |||
| Bhutan | N | Extant | Yes | |||
| Brunei | V | Extant | Yes | |||
| Cambodia | N | Extant | Yes | |||
| China (mainland) | N | Extant | Yes | Yes | Yes | |
| Hong Kong (China) | N | Extant | Yes | |||
| Indonesia | V | Extant | Yes | |||
| Japan | N | Extant | Yes | |||
| Kazakhstan | N | Extant | Yes | |||
| Laos | N | Extant | Yes | |||
| Malaysia | N | Extant | Yes | |||
| Maldives | V | Extant | Yes | |||
| Mongolia | N | Extant | Yes | Yes | ||
| Myanmar | N | Extant | Yes | |||
| North Korea | N | Extant | Yes | Yes | ||
| Northern Mariana Islands (to USA) | V | Extant | Yes | |||
| Pakistan | N | Extant | Yes | |||
| Palau | U | Extant | ||||
| Philippines | V | Extant | Yes | |||
| Russia | N | Extant | Yes | Yes | ||
| Russia (Asian) | N | Extant | Yes | |||
| Singapore | N | Extant | Yes | |||
| South Korea | N | Extant | Yes | Yes | ||
| Taiwan, China | N | Extant | Yes | |||
| Thailand | N | Extant | Yes | |||
| Vietnam | N | Extant | 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 | ||||||
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| 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 | ||||||
|
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| Residential & commercial development | Housing & urban areas | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
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| Transportation & service corridors | Utility & service lines | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
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Recommended citation
BirdLife International (2022) Species factsheet: Buteo japonicus. Downloaded from
http://www.birdlife.org on 22/05/2022.
Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 22/05/2022.
