• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	D1

Red List history

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
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Annual & perennial non-timber crops - Shifting agriculture	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation
Climate change & severe weather	Habitat shifting & alteration	Timing		Scope		Severity		Impact
		Future		Whole (>90%)		Unknown		Unknown
		Stresses Indirect ecosystem effects, Ecosystem degradation

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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 23/11/2024.
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 23/11/2024.