IUCN Red List Criteria
| Critically Endangered |
B2ab(i,ii,iii,iv,v) |
| Endangered |
B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v);C2a(ii) |
| Vulnerable |
B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,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 |
| 1996 |
Critically Endangered |
| 1994 |
Critically Endangered |
| 1988 |
Threatened |
Species attributes
| Migratory status |
not a migrant |
Forest dependency |
High |
| Land mass type |
continent
|
Average mass |
- |
Distribution
| |
Estimate |
Data quality |
| Extent of Occurrence breeding/resident (km2) |
150 |
medium |
| Area of Occupancy breeding/resident (km2) |
4 |
good |
| Number of locations |
3 |
- |
| Fragmentation |
|
- |
Population & trend
| |
Estimate |
Data quality |
Derivation |
Year of estimate |
| No. of mature individuals |
930 |
good |
Estimated |
1997 |
| Population trend |
Decreasing |
poor |
|
- |
| Number of subpopulations |
3 |
- |
- |
- |
| Largest subpopulation |
251-1000 |
- |
- |
- |
| Generation length (yrs) |
6.1 |
- |
- |
- |
Population justification: Waiyaki and Samba (2000) estimate the population to number 1,400 individuals, roughly equivalent to 930 mature individuals.
|
|
Trend justification: The population is suspected to be in decline as the species's montane forest habitat has been severely fragmented and continues to decline in both extent and quality, however the rate of decline has not been quantified. |
Country/Territory distribution
| Country/Territory |
Occurrence status |
Extinct |
Breeding |
Non-breeding |
Passage |
| Kenya |
Native |
No |
|
|
|
Important Bird Areas where this species has triggered the IBA criteria
| Country/Territory |
IBA Name |
IBA link |
| Kenya |
Taita Hills Forests |
 |
Habitats & altitude
| Habitat (level 1) |
Habitat (level 2) |
Importance |
Occurrence |
| Forest |
Subtropical/Tropical Moist Montane |
major |
resident |
|
Altitude
|
1200 - 1725 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 |
| Ongoing |
Whole (>90%) |
Slow, Significant Decline |
Medium Impact: |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| 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 |
|
| 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: Turdus helleri. Downloaded from
http://www.birdlife.org on 18/06/2013.
Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 18/06/2013.
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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