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CR
Sangihe White-eye Zosterops nehrkorni

IUCN Red List Criteria

Critically Endangered B1ab(ii,iii,v);C2a(i,ii);D 
Endangered B1ab(ii,iii,v);C2a(i,ii);D 
Vulnerable B1ab(ii,iii,v);C2a(i,ii);D1+2 

IUCN Red List history

Year Category
2012 Critically Endangered
2009 Critically Endangered
2008 Critically Endangered
2004 Critically Endangered
2000 Critically Endangered
1994 Not Recognised
1988 Not Recognised

Species attributes

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

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 15 medium
Number of locations 1 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 1-49 medium Estimated 2000
Population trend Decreasing poor -
Number of subpopulations 1 - - -
Largest subpopulation 1-49 - - -
Generation length (yrs) 3.5 - - -
Population justification: The population is estimated to number fewer than 50 individuals and mature individuals. This estimate was derived from analyses of recent records and area of remaining habitat (BirdLife International 2001).
Trend justification: Forest loss and degradation continues to be a threat on Sangihe island and as a result this species is suspected to be in decline, although the likely rate of decline has not been estimated.

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
Indonesia Native Extant Yes      

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Indonesia Pegunungan Sahendaruman site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane major resident
Altitude 750 - 1000 m Occasional altitudinal limits  

Threats & impact

Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops / Shifting agriculture Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting / Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline Medium Impact: 6
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
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Unspecified rats (Rattus spp.) Timing Scope Severity Impact
Ongoing Whole (>90%) Unknown Unknown
Stresses
Reduced reproductive success

Recommended citation
BirdLife International (2014) Species factsheet: Zosterops nehrkorni. Downloaded from http://www.birdlife.org on 23/10/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 23/10/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Key facts
Current IUCN Red List category Critically Endangered
Family Zosteropidae (White-eyes)
Species name author Blasius, 1888
Population size 1-49 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 15 km2
Country endemic? Yes
Links to further information
- Summary information on this species