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 |
---|---|---|
- | - | D1 |
Year | Category | Criteria |
---|---|---|
2022 | Vulnerable | D1 |
2016 | Endangered | C2a(i,ii) |
2012 | Endangered | C2a(i,ii) |
2008 | Endangered | C2a(ii) |
2004 | Endangered | |
2002 | Endangered | |
2000 | Critically Endangered | |
1996 | Vulnerable | |
1994 | Vulnerable | |
1988 | Threatened |
Migratory status | not a migrant | Forest dependency | medium |
Land-mass type | Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 80 km2 | medium |
Area of Occupancy (breeding/resident) | 80 km2 | |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 250-999, 500-750 mature individuals | medium | estimated | 2000 |
Population trend | stable | poor | suspected | - |
Generation length | 2.6 years | - | - | - |
Number of subpopulations | 1 | - | - | - |
Percentage of mature individuals in largest subpopulation | 100% | - | - | - |
Population justification: The species is described as locally common (Dutson 2011). An approximate population density of 46 birds/km2 was estimated in the 1990s (Buckingham et al. 1995). In 2020, 26 km2 of forest on its tiny range island (35 km2) was estimated to persist (Global Forest Watch [2021], using Hansen et al. [2013] data and methods disclosed therein). Even if 100% of forest was occupied, the population would number only 1,200 birds, equating to c.800 mature individuals. The population size is therefore placed in the band of 250-999 mature individuals, with a best estimates of 500-750 that assumes that most, but not all, of available habitat is occupied.
Trend justification: There are no robust data on the population trend of this species. Habitat trends over the past ten years are inferred to be stable based on the fact that only 2% of forest in its range has been lost over the past decade (Global Forest Watch [2021], using Hansen et al. [2013] data and methods disclosed therein) and the species is at least to some extent tolerant of secondary habitats (although perhaps only where there is adjacent forest). Consequently, while there may be some localised habitat degradation, the population is suspected to be stable, but this requires confirmation.
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
Solomon Islands | extant | native | yes |
Country/Territory | IBA Name |
---|---|
Solomon Islands | Gizo |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Artificial/Terrestrial | Plantations | suitable | resident |
Forest | Subtropical/Tropical Moist Lowland | major | breeding |
Altitude | 0 - 200 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 | ||||
Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
|||||||||
Agriculture & aquaculture | Annual & perennial non-timber crops - Shifting agriculture | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
|||||||||
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%) | Negligible declines | Low Impact: 4 | ||||||
|
|||||||||
Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
Future | Whole (>90%) | Unknown | Unknown | ||||||
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Recommended citation
BirdLife International (2024) Species factsheet: Gizo White-eye Zosterops luteirostris. Downloaded from
https://datazone.birdlife.org/species/factsheet/gizo-white-eye-zosterops-luteirostris on 03/12/2024.
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 03/12/2024.