EX
Marianne White-eye Zosterops semiflavus



Taxonomy

Taxonomic note
Zosterops maderaspatanus , Z. kirki and Z. semiflavus (del Hoyo and Collar 2016) were previously lumped as Z. maderaspatanus following Dowsett & Forbes-Watson (1993) and Sibley & Monroe (1990, 1993).

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
D D D1

Red List history
Year Category Criteria
2024 Extinct
2016 Extinct
2012 Not Recognised
2008 Not Recognised
2004 Not Recognised
2000 Not Recognised
1994 Not Recognised
1988 Not Recognised
Species attributes

Migratory status not a migrant Forest dependency unknown
Land-mass type Average mass 11 g
Range

Estimate Data quality
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 0 mature individuals good estimated -
Population trend - - -
Generation length 2.55 years - - -

Population justification: No extant population remains.

Trend justification: Very little is known about this recently described species. The last specimen was taken in 1890 (Ridgley 1896, cf. Lionnet 1984), and it is thought to have become extinct by 1900 (Hume 2017). The main drivers of decline was likely deforestation, competition with introduced birds, and predation by introduced black rats Rattus rattus (Hume 2017).


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Seychelles extinct native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Dry possible unknown
Forest Subtropical/Tropical Mangrove Vegetation Above High Tide Level possible unknown
Forest Subtropical/Tropical Moist Lowland possible unknown
Forest Subtropical/Tropical Moist Montane possible unset
Altitude 0 - 130 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Scale Unknown/Unrecorded Timing Scope Severity Impact
Past, Unlikely to Return Unknown Unknown Past Impact
Stresses
Ecosystem degradation, Ecosystem conversion
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Rattus rattus Timing Scope Severity Impact
Past, Unlikely to Return Whole (>90%) Unknown Past Impact
Stresses
Species disturbance, Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Unspecified species Timing Scope Severity Impact
Past, Unlikely to Return Unknown Unknown Past Impact
Stresses
Competition

Recommended citation
BirdLife International (2024) Species factsheet: Marianne White-eye Zosterops semiflavus. Downloaded from https://datazone.birdlife.org/species/factsheet/marianne-white-eye-zosterops-semiflavus on 12/12/2024.
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 12/12/2024.