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 |
---|---|---|
- | - | D1 |
Year | Category | Criteria |
---|---|---|
2018 | Vulnerable | D1 |
2016 | Vulnerable | D1 |
2012 | Vulnerable | D1 |
2008 | Vulnerable | D1 |
2004 | Vulnerable | |
2000 | Vulnerable | |
1994 | Lower Risk/Near Threatened | |
1988 | Threatened |
Migratory status | not a migrant | Forest dependency | high |
Land-mass type | Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 430 km2 | medium |
Number of locations | 1 | - |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 250-999 mature individuals | poor | estimated | 2000 |
Population trend | decreasing | poor | suspected | 1998-2008 |
Generation length | 3.7 years | - | - | - |
Number of subpopulations | 1 | - | - | - |
Percentage of mature individuals in largest subpopulation | 100% | - | - | - |
Population justification: The population is estimated to number 250-999 mature individuals based on an assessment of known records, descriptions of abundance and range size. This is consistent with recorded population density estimates for congeners or close relatives with a similar body size, and the fact that only a proportion of the estimated Extent of Occurrence is likely to be occupied. This estimate is equivalent to 375-1,499 individuals in total, rounded here to 350-1,500 individuals.
Trend justification: The population is tentatively suspected to be declining as a result of ongoing habitat degradation.
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
São Tomé e Príncipe | extant | native | yes |
Country/Territory | IBA Name |
---|---|
São Tomé e Príncipe | Parque Natural Obô de São Tomé e Zona Tampão |
São Tomé e Príncipe | São Tomé lowland forests |
São Tomé e Príncipe | São Tomé montane and cloud-forests |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Forest | Subtropical/Tropical Moist Lowland | major | resident |
Forest | Subtropical/Tropical Moist Montane | major | resident |
Altitude | 0 - 1500 m | Occasional altitudinal limits |
Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
---|---|---|---|---|---|---|---|---|---|
Agriculture & aquaculture | Annual & perennial non-timber crops - Scale Unknown/Unrecorded | Timing | Scope | Severity | Impact | ||||
Past, Unlikely to Return | Majority (50-90%) | Rapid Declines | Past Impact | ||||||
|
|||||||||
Agriculture & aquaculture | Annual & perennial non-timber crops - Small-holder farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
|||||||||
Biological resource use | Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
|||||||||
Residential & commercial development | Commercial & industrial areas | Timing | Scope | Severity | Impact | ||||
Future | Minority (<50%) | No decline | Low Impact: 3 | ||||||
|
|||||||||
Transportation & service corridors | Roads & railroads | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | No decline | Low Impact: 4 | ||||||
|
Recommended citation
BirdLife International (2024) Species factsheet: Sao Tome Scops-owl Otus hartlaubi. Downloaded from
https://datazone.birdlife.org/species/factsheet/sao-tome-scops-owl-otus-hartlaubi 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.