IUCN Red List Criteria
| Critically Endangered |
|
| Endangered |
B1ab(ii,iii,v);C2a(i) |
| Vulnerable |
B1ab(ii,iii,v);C2a(i);D1 |
IUCN Red List history
| Year |
Category |
| 2012 |
Endangered |
| 2008 |
Endangered |
| 2004 |
Endangered |
| 2000 |
Endangered |
| 1996 |
Vulnerable |
| 1994 |
Vulnerable |
| 1988 |
Lower Risk/Least Concern |
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) |
1,200 |
medium |
| Number of locations |
11-100 |
- |
| Fragmentation |
|
- |
Population & trend
| |
Estimate |
Data quality |
Derivation |
Year of estimate |
| No. of mature individuals |
250-999 |
medium |
Estimated |
2005 |
| Population trend |
Decreasing |
poor |
|
- |
| Number of subpopulations |
2-100 |
- |
- |
- |
| Largest subpopulation |
220-890 |
- |
- |
- |
| Generation length (yrs) |
5.8 |
- |
- |
- |
|
Population justification: Tipanaa (in litt. 2007) indicates a population size of c.500 individuals, which is best placed in the band 250-999 mature individuals. This equates to 375-1,499 individuals in total, rounded here to 350-1,500 individuals. |
|
Trend justification: The species is suspected to be undergoing a moderate decline owing to habitat degradation and predation by introduced mammals, which is on-going. |
Country/Territory distribution
| Country/Territory |
Occurrence status |
Extinct |
Breeding |
Non-breeding |
Passage |
| American Samoa |
Unknown |
Yes |
|
|
|
| Samoa |
Native |
No |
Yes |
|
|
Important Bird Areas where this species has triggered the IBA criteria
| Country/Territory |
IBA Name |
IBA link |
| Samoa |
Apia Catchments |
 |
| Samoa |
Central Savaii Rainforest (includes Tuasivi Ridge AZE) |
|
| Samoa |
Eastern Upolu Craters |
|
| Samoa |
O Le Pupu-Pu'e National Park |
|
| Samoa |
Uafato-Tiavea Forest |
|
Habitats & altitude
| Habitat (level 1) |
Habitat (level 2) |
Importance |
Occurrence |
| Forest |
Subtropical/Tropical Moist Lowland |
major |
resident |
| Forest |
Subtropical/Tropical Moist Montane |
major |
resident |
| Shrubland |
Subtropical/Tropical High Altitude |
marginal |
resident |
|
Altitude
|
760 - 1500 m
|
Occasional altitudinal limits
|
|
Threats & impact
| Threat (level 1) |
Threat (level 2) |
Impact and Stresses |
| Agriculture & Aquaculture |
Annual & perennial non-timber crops / Small-holder farming |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Whole (>90%) |
Slow, Significant Decline |
Medium Impact: |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Unspecified eucalyptus (Eucalyptus spp.) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
Slow, Significant Decline |
Medium Impact: |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Unspecified pines (Pinus spp.) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
Slow, Significant Decline |
Medium Impact: |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Unspecified rats (Rattus spp.) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
Slow, Significant Decline |
Medium Impact: |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Unspecified trees |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
Slow, Significant Decline |
Medium Impact: |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Climate change & severe weather |
Storms & flooding |
Timing |
Scope |
Severity |
Impact |
| Past, Likely to Return |
Majority (50-90%) |
Very Rapid Declines |
Past Impact |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
Recommended citation
BirdLife International (2013) Species factsheet: Gymnomyza samoensis. Downloaded from
http://www.birdlife.org on 21/05/2013.
Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 21/05/2013.
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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