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Pitcairn Reed-warbler Acrocephalus vaughani

IUCN Red List Criteria

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

IUCN Red List history

Year Category
2012 Endangered
2008 Endangered
2004 Vulnerable
2000 Vulnerable
1996 Vulnerable
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) 5 medium
Area of Occupancy breeding/resident (km2) 5
Number of locations 1 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 250-999 poor Estimated 1999
Population trend Decreasing poor -
Number of subpopulations 1 - - -
Largest subpopulation 250-999 - - -
Generation length (yrs) 4.4 - - -
Population justification: The total population is placed in the band 250-999 mature individuals (E. Bell in litt. 2007), equating to 375-1,499 individuals in total, rounded here to 350-1,500 individuals.
Trend justification: There are no new quantitative data on population size and trends; however, since the unsuccessful eradication of feral cats and Pacific rats, the species is suspected to be declining at a slow rate as the populations of these pests recover.

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage
Pitcairn Islands (to UK) Native Extant      

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Pitcairn Islands (to UK) Pitcairn Island site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Rural Gardens suitable resident
Forest Subtropical/Tropical Moist Lowland major resident
Shrubland Subtropical/Tropical Moist suitable resident
Altitude 0 - 0 m Occasional altitudinal limits  

Threats & impact

Threat (level 1) Threat (level 2) Impact and Stresses
Biological resource use Gathering terrestrial plants / Unintentional effects (species is not the target) Timing Scope Severity Impact
Ongoing Whole (>90%) Negligible declines Medium Impact:
Stresses
Ecosystem degradation, Ecosystem conversion
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 / Domestic Cat (Felis catus) Timing Scope Severity Impact
Ongoing Whole (>90%) Rapid Declines High Impact: 8
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Goat (Capra hircus) Timing Scope Severity Impact
Ongoing Whole (>90%) Slow, Significant Decline Medium Impact:
Stresses
Ecosystem degradation
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Polynesian Rat (Rattus exulans) Timing Scope Severity Impact
Ongoing Whole (>90%) Slow, Significant Decline Medium Impact:
Stresses
Reduced reproductive success
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Rose Apple (Eugenia jambos) Timing Scope Severity Impact
Ongoing Whole (>90%) Slow, Significant Decline Medium Impact:
Stresses
Ecosystem degradation

Recommended citation
BirdLife International (2014) Species factsheet: Acrocephalus vaughani. Downloaded from http://www.birdlife.org on 11/07/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 11/07/2014.

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 Endangered
Family Sylviidae (Old World warblers)
Species name author (Sharpe, 1900)
Population size 250-999 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 5 km2
Country endemic? Yes
Links to further information
- Summary information on this species