Rennell White-eye Zosterops rennellianus


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.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2019 Least Concern
2016 Least Concern
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Lower Risk/Near Threatened
1988 Lower Risk/Least Concern
Species attributes

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

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 1,200
Severely fragmented? no -
Population and trend
Value Data quality Derivation Year of estimate
Number of mature individuals 8800-75800 poor suspected 2019
Population trend decreasing suspected -
Percentage in largest subpopulation 100 - - -
Generation length (years) 3.5 - - -

Population justification: The global population size has not been quantified, but the species is described as common (Doughty et al. 1999). Analysis based on land cover data and a population density model estimated the population size of Rennell White-eye at around 11,700 mature individuals (Santini et al. 2019). Another estimate, based on the area of the species’s mapped range, the first quartile and median recorded population densities of other Zosterops species in Asia and the Pacific, and assuming that 13-45% of the range is occupied, the species’s population size is estimated to fall within the broad range 8,800 – 75,800 mature individuals.

Trend justification: The population is suspected to be in decline owing to ongoing habitat destruction and fragmentation. More evidence is needed to determine whether this qualifies as a continuing decline.

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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Solomon Islands East Rennell

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland suitable resident
Altitude   Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Biological resource use Logging & wood harvesting - Intentional use: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Unknown Unknown Unknown
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2023) Species factsheet: Zosterops rennellianus. Downloaded from on 23/09/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from on 23/09/2023.