Taxonomic note
Zosterops leucophaeus (del Hoyo and Collar 2016) was previously listed as Speirops leucophoeus.
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 |
---|---|---|
2019 | Least Concern | |
2016 | Near Threatened | B1ab(ii,iii,v); C2a(ii); D2 |
2012 | Near Threatened | B1ab(ii,iii,v);C2a(ii);D2 |
2008 | Near Threatened | B1a+b(ii,iii); C2a(ii); D1; D2 |
2004 | Near Threatened | |
2000 | Lower Risk/Near Threatened | |
1996 | Vulnerable | |
1994 | Vulnerable | |
1988 | Threatened |
Migratory status | not a migrant | Forest dependency | medium |
Land-mass type | Average mass | 15 g |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 200 km2 | medium |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 4300 - 8200 mature individuals | medium | estimated | 2019 |
Population trend | unknown | - | - | - |
Generation length | 4.4 years | - | - | - |
Percentage of mature individuals in largest subpopulation | 100% | - | - | - |
Population justification: Population surveys were carried out in 2014, but are as yet unpublished (S. Valle in litt. 2019). Unless new information becomes available, the population size is provisionally placed in the band 4,300-8,200 mature individuals.
Trend justification: The population trend for this species is not known. The species is unlikely to be undergoing significant declines despite ongoing conversion of primary forest into agricultural land, as presence rates of the species are higher in modified habitat than primary forest (F. Sinclair in litt. 2019).
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 | Príncipe forests |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Artificial/Terrestrial | Plantations | suitable | resident |
Artificial/Terrestrial | Subtropical/Tropical Heavily Degraded Former Forest | suitable | resident |
Forest | Subtropical/Tropical Moist Lowland | suitable | resident |
Shrubland | Subtropical/Tropical Moist | suitable | resident |
Altitude | 0 - 800 m | Occasional altitudinal limits |
Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
---|---|---|---|---|---|---|---|---|---|
Agriculture & aquaculture | Annual & perennial non-timber crops - Small-holder farming | Timing | Scope | Severity | Impact | ||||
Future | Majority (50-90%) | Negligible declines | Low Impact: 3 | ||||||
|
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Pollution | Agricultural & forestry effluents - Herbicides and pesticides | Timing | Scope | Severity | Impact | ||||
Past, Unlikely to Return | Majority (50-90%) | Slow, Significant Declines | Past Impact | ||||||
|
|||||||||
Residential & commercial development | Commercial & industrial areas | Timing | Scope | Severity | Impact | ||||
Future | Minority (<50%) | Negligible declines | No/Negligible Impact: 2 | ||||||
|
Recommended citation
BirdLife International (2024) Species factsheet: Principe Speirops Zosterops leucophaeus. Downloaded from
https://datazone.birdlife.org/species/factsheet/principe-speirops-zosterops-leucophaeus 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.