Data Zone
Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 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 | medium |
| Land-mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 1,600,000 km2 | |
| Extent of Occurrence (non-breeding) | 2,000,000 km2 | |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | unknown | - | - | - |
| Population trend | decreasing | - | inferred | - |
| Generation length | 3.7 years | - | - | - |
Population justification: The global population size has not been quantified, but the species is described as scarce in Nepal, uncommon in India and locally fairly common in Bhutan (Grimmett et al. 1998)
Trend justification:
The species is tentatively assessed as being in decline due to habitat loss per Tracewski et al. (2016) and unsustainable levels of hunting.
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Bangladesh | extant | native | yes | |||
| Bhutan | extant | native | yes | |||
| China (mainland) | extant | native | yes | |||
| India | extant | native | ||||
| Laos | extant | native | yes | |||
| Myanmar | extant | native | yes | |||
| Nepal | extant | native | yes | |||
| Sri Lanka | extant | vagrant | yes | |||
| Thailand | extant | native | yes | |||
| Vietnam | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| India | Barail Range forests |
| India | Barail Wildlife Sanctuary |
| Thailand | Doi Chiang Dao |
| Thailand | Doi Inthanon |
| Thailand | Doi Suthep-Pui |
| Thailand | Kaeng Krachan |
| Thailand | Mae Fang |
| Thailand | Mae Jarim National Park |
| Thailand | Nanthaburi |
| Thailand | Thung Yai - Naresuan |
| Thailand | Umphang |
| Vietnam | Bi Dup |
| Vietnam | Tuyen Lam |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Artificial/Terrestrial | Subtropical/Tropical Heavily Degraded Former Forest | suitable | non-breeding |
| Artificial/Terrestrial | Subtropical/Tropical Heavily Degraded Former Forest | suitable | breeding |
| Forest | Subtropical/Tropical Dry | major | non-breeding |
| Forest | Subtropical/Tropical Dry | major | breeding |
| Forest | Subtropical/Tropical Moist Lowland | suitable | non-breeding |
| Forest | Subtropical/Tropical Moist Lowland | suitable | breeding |
| Forest | Subtropical/Tropical Moist Montane | suitable | non-breeding |
| Forest | Subtropical/Tropical Moist Montane | suitable | breeding |
| Altitude | Occasional altitudinal limits |
| Purpose | Scale |
|---|---|
| Pets/display animals, horticulture | international |
Recommended citation
BirdLife International (2024) Species factsheet: Slender-billed Oriole Oriolus tenuirostris. Downloaded from
https://datazone.birdlife.org/species/factsheet/slender-billed-oriole-oriolus-tenuirostris on 23/12/2024.
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 23/12/2024.