Data Zone
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 | |
| 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 | altitudinal migrant | Forest dependency | high |
| Land-mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 21,200,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | 40000-400000 mature individuals | poor | suspected | 2021 |
| Population trend | decreasing | - | suspected | 2016-2028 |
| Rate of change over the past 10 years/3 generations (longer of the two periods) | 1-10% | - | - | - |
| Rate of change over the future 10 years/3 generations (longer of the two periods) | 5-15% | - | - | - |
| Rate of change over the past & future 10 years/3 generations (longer of the two periods) | 5-15% | - | - | - |
| Generation length | 4.16 years | - | - | - |
Population justification: Ferguson-Lees and Christie (2001) estimate the global population to be around 100,000 individuals, roughly equating to 67,000 mature individuals. National population sizes have been estimated at c.10,000-100,000 breeding pairs in China and c.10,000-100,000 breeding pairs in Taiwan, China (Brazil 2009). In the absence of information from other parts of its range, it is placed in the band 40,000-400,000 mature individuals
Trend justification: The population is suspected to be in decline owing to ongoing forest loss (Ferguson-Lees and Christie 2001). During 2001-2020, 8.9% forest cover was lost across this species’s range (Global Forest Watch 2021), equating to a loss of 5.9% over three generations (12.48 years [Bird et al. 2020]). During 2016-2020, 3.3% of forest cover was lost (Global Forest Watch 2021), equivalent to 10.3% when projected forward over three generations. This species is highly dependent on forest habitats (Ferguson-Lees and Christie 2001). There are currently no other known threats to the species, therefore it is suspected to be declining at a similar rate to forest loss.
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Bangladesh | extant | native | yes | |||
| Bhutan | extant | native | yes | |||
| Cambodia | extant | native | yes | |||
| China (mainland) | extant | native | yes | |||
| India | extant | native | yes | |||
| Indonesia | extant | native | yes | |||
| Laos | extant | native | yes | |||
| Malaysia | extant | native | yes | |||
| Myanmar | extant | native | yes | |||
| Nepal | extant | native | yes | |||
| Pakistan | extant | native | yes | |||
| Philippines | extant | native | yes | |||
| Singapore | extant | vagrant | ||||
| Sri Lanka | extant | native | 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 | non-breeding |
| Artificial/Terrestrial | Plantations | suitable | resident |
| Forest | Subtropical/Tropical Mangrove Vegetation Above High Tide Level | suitable | resident |
| Forest | Subtropical/Tropical Moist Lowland | suitable | resident |
| Forest | Subtropical/Tropical Moist Montane | suitable | resident |
| Forest | Temperate | suitable | resident |
| Altitude | 300 - 2200 m | Occasional altitudinal limits | (max) 3440 m |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| 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 | ||||||
|
|||||||||
| Purpose | Scale |
|---|---|
| Food - human | subsistence, national |
| Pets/display animals, horticulture | international |
Recommended citation
BirdLife International (2024) Species factsheet: Besra Accipiter virgatus. Downloaded from
https://datazone.birdlife.org/species/factsheet/besra-accipiter-virgatus on 18/12/2024.
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 18/12/2024.