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

Taxonomic note

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.
Dutson, G. 2008. A new species of White-eye Zosterops and notes on other birds from Vanikoro, Solomon Islands. Ibis 150: 698-706.
Dutson, G. 2008. A new species of White-eye Zosterops and notes on other birds from Vanikoro, Solomon Islands. Ibis 150: 698-706.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2016	Least Concern
2012	Least Concern
2009	Least Concern
2008	Not Recognised
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

Migratory status	not a migrant	Forest dependency	high
Land-mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	260 km2	good
Number of locations	1	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	poor	suspected	2009
Population trend	increasing	poor	observed	1999-2009
Rate of change over the past 10 years/3 generations (longer of the two periods)	0%	-	-	-
Generation length	3.5 years	-	-	-

Population justification: The species was common above 700 m on Vanikoro where it was recorded at a density of 25 individuals in 1.5 ha, but it was much less common in the lowlands. Vanikoro has a total area of 173 km2, much of which remains forested. Crude interpretation of this data suggests the population can be cautiously estimated to fall within the band 20,000-49,999 individuals.

Trend justification: The only plausible threat to the species posed by introduced rats Rattus spp. has been evident for decades but the species remains relatively common. There are no repeat counts to assess trends, but congeners on other Melanesian islands occur at comparable densities on rat-free and rat-infested islands so the population of this species is suspected to be stable.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Solomon Islands	extant	native	yes

Country/Territory	IBA Name
Solomon Islands	Vanikoro

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude	0 - 800 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Named species	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		No decline		Low Impact: 5
		Stresses Reduced reproductive success

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Recommended citation
BirdLife International (2024) Species factsheet: Vanikoro White-eye Zosterops gibbsi. Downloaded from https://datazone.birdlife.org/species/factsheet/vanikoro-white-eye-zosterops-gibbsi 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.