Data Zone
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 |
|---|---|---|
| 2021 | Near Threatened | A2c+3c+4c |
| 2016 | Near Threatened | A2c+3c+4c |
| 2012 | Near Threatened | A2c+3c+4c |
| 2008 | Near Threatened | A2c; A3c; A4c |
| 2004 | Near Threatened | |
| 2000 | Lower Risk/Near Threatened | |
| 1994 | Lower Risk/Least Concern | |
| 1988 | Lower Risk/Least Concern |
| Migratory status | not a migrant | Forest dependency | high |
| Land-mass type |
continent shelf island |
Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 2,940,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | unknown | - | - | - |
| Population trend | decreasing | poor | inferred | 2014-2026 |
| 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 | 3.8 years | - | - | - |
Population justification: The global population size has not been quantified, but the species is described as generally common in primary forests, but less abundant in secondary forests, and is extinct in Singapore (del Hoyo et al. 2007).
Trend justification: Remote sensing data indicate a relatively rapid rate of forest loss, equivalent to c.20% over three generations (Global Forest Watch 2021). A continuing decline is inferred from forest degradation, owed to clearance for logging, land conversion for agriculture and fires (Collar and Robson 2020). Although the species is known to occur in logged and secondary forests, it is thought to be in far less abundance than primary forest (D. Edwards in litt. 2020). As such, the scale of damage from forest clearance is thought to have been previously overlooked (D. Edwards in litt. 2020). In a comparative study of understorey babblers in the Sundaic region, Styring et al. (2016) found densities of 4.3 individuals/ha in continuous natural forest, 3.6 individuals/ha in logged native forest fragments, 6.1 individuals/ha in mature plantations and 3.6 individuals/ha in young (<5 years old) plantations, but none were found in oil palm plantations. This suggests the impact of forest clearance may be mitigated partly by the increase in plantation area, however Edwards et al. (2010) and Hamer et al. (2015) found that while present, birds occurred at half the density in twice-logged forest than in unlogged forest: hence a very significant population decline may be masked if judged on presence alone. Rates of deforestation have been rapid within the range, and much of this has been absolute clearance of intact forest and replacement with unsuitable oil palm. This species is therefore suspected to be declining, and continue to decline, at a relatively rapid rate of 20-29% over three generations (11.4 years; Bird et al. 2020).
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Brunei | extant | native | yes | |||
| Indonesia | extant | native | yes | |||
| Malaysia | extant | native | yes | |||
| Singapore | extinct | native | yes | |||
| Thailand | extant | native | yes |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Moist Lowland | major | resident |
| Forest | Subtropical/Tropical Swamp | suitable | resident |
| Shrubland | Subtropical/Tropical Moist | suitable | resident |
| Altitude | 0 - 800 m | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Agriculture & aquaculture | Annual & perennial non-timber crops - Agro-industry farming | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
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| Agriculture & aquaculture | Annual & perennial non-timber crops - Small-holder farming | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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| Biological resource use | Logging & wood harvesting - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
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| 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 | ||||||
|
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| Natural system modifications | Fire & fire suppression - Increase in fire frequency/intensity | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
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Recommended citation
BirdLife International (2024) Species factsheet: Chestnut-rumped Babbler Stachyris maculata. Downloaded from
https://datazone.birdlife.org/species/factsheet/chestnut-rumped-babbler-stachyris-maculata on 22/11/2024.
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 22/11/2024.