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. 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.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 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 | not a migrant | Forest dependency | Medium |
| Land mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 4,270,000 | |
| Number of locations | - | |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | unknown | not applicable | not applicable | 0 |
| Population trend | Stable | suspected | - | |
| 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) | 11.6 | - | - | - |
Population justification: The global population size has not been quantified, but the species is reported to be uncommon to fairly common (del Hoyo et al. 1999).
Trend justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.
| Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Brunei | N | Extant | Yes | |||
| Indonesia | N | Extant | Yes | |||
| Malaysia | N | Extant | Yes | |||
| Myanmar | N | Extant | Yes | |||
| Singapore | N | Extinct | Yes | |||
| Thailand | N | Extant | Yes |
| Country/Territory | IBA Name |
|---|---|
| Malaysia | Bintang Range |
| Malaysia | Pondok Tanjung Forest Reserve |
| Malaysia | Belum-Temenggor |
| Malaysia | Central Titiwangsa Range |
| Malaysia | Endau-Rompin |
| Malaysia | Panti forest |
| Malaysia | Krau Wildlife Reserve |
| Malaysia | Taman Negara National Park |
| Malaysia | South-east Pahang peat swamp forest |
| Malaysia | Danum Valley Conservation Area |
| Malaysia | Tawau Hills Park |
| Malaysia | Tabin Wildlife Reserve |
| Malaysia | Klias peninsula |
| Malaysia | Kabili-Sepilok |
| Malaysia | Tanjung Datu-Samunsam Protected Area |
| Malaysia | Gunung Pueh |
| Malaysia | Bako-Buntal Bay |
| Malaysia | Bau Limestone |
| Malaysia | Lanjak Entimau Wildlife Sanctuary |
| Malaysia | Similajau National Park |
| Malaysia | Niah National Park |
| Malaysia | Lambir Hills National Park |
| Malaysia | Kelabit Highlands |
| Thailand | Bala Sector, Hala-Bala Wildlife Sanctuary |
| Thailand | Khao Nor Chuchi |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Artificial/Terrestrial | Plantations | suitable | resident |
| Artificial/Terrestrial | Rural Gardens | suitable | resident |
| Forest | Subtropical/Tropical Moist Lowland | major | resident |
| Altitude | 0 - 1600 m | Occasional altitudinal limits |
Recommended citation
BirdLife International (2021) Species factsheet: Bubo sumatranus. Downloaded from
http://www.birdlife.org on 06/12/2021.
Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 06/12/2021.
