IUCN Red List Criteria
| Critically Endangered |
|
| Endangered |
|
| Vulnerable |
D2 |
IUCN Red List history
| Year |
Category |
| 2012 |
Vulnerable |
| 2008 |
Vulnerable |
| 2004 |
Vulnerable |
| 2000 |
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) |
41 |
medium |
| Area of Occupancy breeding/resident (km2) |
37 |
|
| Number of locations |
1 |
- |
| Fragmentation |
|
- |
Population & trend
| |
Estimate |
Data quality |
Derivation |
Year of estimate |
| No. of mature individuals |
7200 |
medium |
Estimated |
1987 |
| Population trend |
Stable |
poor |
|
- |
| Number of subpopulations |
1 |
- |
- |
- |
| Largest subpopulation |
7200 |
- |
- |
- |
| Generation length (yrs) |
6.9 |
- |
- |
- |
|
Population justification: Graves (1992) estimated the population at 10,800 individuals, equating to c.7,200 mature individuals. |
|
Trend justification: There are no new data on population trends; however, the species's entire range is within a World Heritage Site and despite limited predation by Pacific rats Rattus exulans it is thought to be stable. |
Country/Territory distribution
| Country/Territory |
Occurrence status |
Extinct |
Breeding |
Non-breeding |
Passage |
| Pitcairn Islands (to UK) |
Native |
No |
Yes |
|
|
Important Bird Areas where this species has triggered the IBA criteria
| Country/Territory |
IBA Name |
IBA link |
| Pitcairn Islands (to UK) |
Henderson Island |
 |
Habitats & altitude
| Habitat (level 1) |
Habitat (level 2) |
Importance |
Occurrence |
| Forest |
Subtropical/Tropical Dry |
major |
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 |
Minority (<50%) |
No decline |
Low Impact: 4 |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Black Rat (Rattus rattus) |
Timing |
Scope |
Severity |
Impact |
| Future |
Whole (>90%) |
Very Rapid Declines |
Medium Impact: |
| Stresses |
|---|
| Reduced reproductive success |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Domestic Cat (Felis catus) |
Timing |
Scope |
Severity |
Impact |
| Future |
Whole (>90%) |
Very Rapid Declines |
Medium Impact: |
| Stresses |
|---|
| Species mortality |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Polynesian rat (Rattus exulans) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Whole (>90%) |
Negligible declines |
Medium Impact: |
| Stresses |
|---|
| Reduced reproductive success |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Unspecified micro-organisms |
Timing |
Scope |
Severity |
Impact |
| Future |
Whole (>90%) |
Very Rapid Declines |
Medium Impact: |
| Stresses |
|---|
| Species mortality |
|
| Climate change & severe weather |
Habitat shifting & alteration |
Timing |
Scope |
Severity |
Impact |
| Future |
Whole (>90%) |
Unknown |
Unknown |
| Stresses |
|---|
| Indirect ecosystem effects, Ecosystem degradation, Ecosystem conversion |
|
Recommended citation
BirdLife International (2013) Species factsheet: Acrocephalus taiti. Downloaded from
http://www.birdlife.org on 22/05/2013.
Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 22/05/2013.
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.
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