Taxonomic note
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.
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.
Critically Endangered | Endangered | Vulnerable |
---|---|---|
- | - | - |
Year | Category | Criteria |
---|---|---|
2016 | Near Threatened | C2a(ii) |
2015 | Near Threatened | C2a(ii) |
2012 | Near Threatened | C2a(ii) |
2008 | Near Threatened | C2a(ii) |
2004 | Near Threatened | |
2000 | Lower Risk/Near Threatened | |
1994 | Lower Risk/Near Threatened | |
1988 | Threatened |
Migratory status | not a migrant | Forest dependency | high |
Land-mass type |
shelf island |
Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 25,700 km2 | medium |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 6000-15000 mature individuals | poor | suspected | 2000 |
Population trend | decreasing | medium | suspected | 1998-2008 |
Generation length | 3 years | - | - | - |
Number of subpopulations | 2-100 | - | - | - |
Percentage of mature individuals in largest subpopulation | 1-89% | - | - | - |
Population justification: This species appears to be genuinely rare within a restricted range. Hence, its population is provisionally estimated to number c. 10,000-19,999 individuals, but density estimates are needed to inform a more accurate global population estimate. This estimate equates to 6,667-13,333 mature individuals, rounded here to 6,000-15,000 mature individuals.
Trend justification: This species is thought to be declining owing to loss and degradation of forest habitats within its range, particularly at the lower limit of its altitudinal distribution. The rate of decline has not been estimated.
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
Malaysia | extant | native | yes |
Country/Territory | IBA Name |
---|---|
Malaysia | Baleh headwaters |
Malaysia | Crocker Range |
Malaysia | Danum-Linau |
Malaysia | Dulit Range |
Malaysia | Kelabit Highlands |
Malaysia | Lanjak Entimau Wildlife Sanctuary |
Malaysia | Mount Kinabalu |
Malaysia | Mulu - Buda Protected Area |
Malaysia | Trus Madi Range |
Malaysia | Usun Apau plateau |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Forest | Subtropical/Tropical Moist Montane | major | resident |
Altitude | 1200 - 2300 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%) | 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%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
|||||||||
Natural system modifications | Fire & fire suppression - Increase in fire frequency/intensity | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
Recommended citation
BirdLife International (2024) Species factsheet: Everett's Thrush Zoothera everetti. Downloaded from
https://datazone.birdlife.org/species/factsheet/everetts-thrush-zoothera-everetti on 23/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 23/12/2024.