Taxonomic note
Geokichla erythronota (del Hoyo and Collar 2016) was previously listed as Zoothera erythronota.
Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.
Critically Endangered | Endangered | Vulnerable |
---|---|---|
- | - | - |
Year | Category | Criteria |
---|---|---|
2018 | Near Threatened | A2cd+3cd+4cd |
2016 | Near Threatened | A2cd+3cd+4cd |
2012 | Near Threatened | A2cd+3cd+4cd |
2008 | Near Threatened | A2c,d; A3c,d; A4c,d |
2006 | Near Threatened | |
2004 | Not Recognised | |
2000 | Not Recognised | |
1994 | Not Recognised | |
1988 | Not Recognised |
Migratory status | not a migrant | Forest dependency | high |
Land-mass type | Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 426,000 km2 | medium |
Number of locations | 11-100 | - |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 100000-499999 mature individuals | medium | estimated | 2006 |
Population trend | decreasing | poor | suspected | 1998-2008 |
Rate of change over the past 10 years/3 generations (longer of the two periods) | 20-29% | - | - | - |
Rate of change over the future 10 years/3 generations (longer of the two periods) | 20-29% | - | - | - |
Rate of change over the past & future 10 years/3 generations (longer of the two periods) | 20-29% | - | - | - |
Generation length | 3 years | - | - | - |
Number of subpopulations | 2-100 | - | - | - |
Percentage of mature individuals in largest subpopulation | 1-89% | - | - | - |
Population justification: Population estimate = 20 individuals/km2 x 17,000 km2 (20% of EOO) = 340,000 individuals (density range from up to lower quartile of two Asian congeners in BirdLife Bird Population Density Spreadsheet). Perhaps best currently placed in population band of 100,000-499,999 individuals, but population may prove to be much lower given its extremely patchy distribution.
Trend justification: Forest destruction within its altitudinal range has been extensive in recent decades. Since it does not appear tolerant to habitat degradation through much of its range, its populations must have suffered a commensurate decline, assumed here to approach the thresholds for listing as Vulnerable declines are perhaps best placed in the band 20-30% over ten years.
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
Indonesia | extant | native | yes |
Country/Territory | IBA Name |
---|
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Artificial/Terrestrial | Plantations | marginal | resident |
Forest | Subtropical/Tropical Moist Lowland | major | resident |
Shrubland | Subtropical/Tropical Moist | marginal | resident |
Altitude | 0 - 1000 m | Occasional altitudinal limits |
Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
---|---|---|---|---|---|---|---|---|---|
Agriculture & aquaculture | Annual & perennial non-timber crops - Small-holder farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Rapid Declines | Medium Impact: 6 | ||||||
|
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Agriculture & aquaculture | Livestock farming & ranching - Small-holder grazing, ranching or farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Rapid Declines | Medium Impact: 6 | ||||||
|
|||||||||
Biological resource use | Hunting & trapping terrestrial animals - Intentional use (species is the target) | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
|||||||||
Biological resource use | Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Rapid Declines | Medium Impact: 6 | ||||||
|
|||||||||
Natural system modifications | Fire & fire suppression - Trend Unknown/Unrecorded | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Rapid Declines | Medium Impact: 6 | ||||||
|
Purpose | Scale |
---|---|
Pets/display animals, horticulture | subsistence, national |
Recommended citation
BirdLife International (2025) Species factsheet: Red-backed Thrush Geokichla erythronota. Downloaded from
https://datazone.birdlife.org/species/factsheet/red-backed-thrush-geokichla-erythronota on 11/01/2025.
Recommended citation for factsheets for more than one species: BirdLife International (2025) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 11/01/2025.