Taxonomic note
Previously listed as Chatarrhaea longirostris (del Hoyo and Collar 2016) but moved to current genus following Cai et al. (2019). Formerly listed as Turdoides longirostris. Birds reported from SW Myanmar not yet assigned to subspecies. Two subspecies recognized.
Taxonomic source(s)
Handbook of the Birds of the World and BirdLife International. 2021. Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 6. Available at: https://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v6_Dec21.zip.
Critically Endangered | Endangered | Vulnerable |
---|---|---|
- | - | B2ab(iii) |
Year | Category | Criteria |
---|---|---|
2024 | Vulnerable | B2ab(iii) |
2016 | Vulnerable | A2c+3c+4c |
2012 | Vulnerable | A2c+3c+4c |
2008 | Vulnerable | A2c; A3c; A4c |
2004 | Vulnerable | |
2000 | Vulnerable | |
1994 | Lower Risk/Near Threatened | |
1988 | Near Threatened |
Migratory status | not a migrant | Forest dependency | does not normally occur in forest |
Land-mass type |
continent |
Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 127,000 km2 | medium |
Area of Occupancy (breeding/resident) | 500 km2 | |
Number of locations | 5-20 | - |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 4200-8800 mature individuals | poor | estimated | 2006 |
Population trend | decreasing | poor | suspected | - |
Generation length | 3.08 years | - | - | - |
Number of subpopulations | 5 | - | - | - |
Percentage of mature individuals in largest subpopulation | 1-89% | - | - | - |
Population justification: The population size of this species is not precisely known, but given it is confined to only five sites it is suspected to be relatively small. The largest (or second-largest) remaining population, in Chitwan National Park, was estimated to number 1,400-2,200 mature individuals (Baral and Chaudhary 2006, Inskipp et al. 2016). The population in Kaziranga National Park is likely to be a similar size (or possibly slightly larger) (A. Choudhury in litt. 2016). There has been no attempt to estimate the other three sites of occupancy, but the area of suitable habitat in each of them is smaller than Chitwan and Kaziranga. Accordingly, these three sites combined is thought to host approximately 1,400-4,400 mature individuals (the minimum bound being the minimum number at one of Kaziranga/Chitwan, the upper bound being double the upper bound of one of Kaziranga/Chitwan). Combined, the global population is estimated to number 4,200-8,800 mature individuals.
Trend justification: Suspected to be declining, albeit probably very slowly, in response to ongoing habitat pressures (Krishnan 2021). Populations are greatly fragmented, and while it is evident the species is able to persist short-term in isolated pockets of habitat, the viability of these in the long-term is unknown.
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
India | extant | native | yes | |||
Nepal | extant | native | yes |
Country/Territory | IBA Name |
---|---|
India | Kaziranga National Park |
India | Lowland forests of South Sikkim (Melli-Baguwa-Kitam, Jorethang-Namchi, Sombarey) |
India | Manas National Park |
India | Manas Reserve Forest |
India | Nameri National Park |
India | Pangolakha Wildlife Sanctuary - Zuluk - Bedang Tso - Natula Complex |
Nepal | Chitwan National Park |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Grassland | Subtropical/Tropical Seasonally Wet/Flooded | major | resident |
Altitude | 0 - 1200 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 | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
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Agriculture & aquaculture | Livestock farming & ranching - Agro-industry grazing, ranching or farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Agriculture & aquaculture | Livestock farming & ranching - Small-holder grazing, ranching or farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
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Biological resource use | Gathering terrestrial plants - Unintentional effects (species is not the target) | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Bombax ceiba | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Unknown | Unknown | ||||||
|
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Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Mikania micrantha | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Unknown | Unknown | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Mimosa diplotricha | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Unknown | Unknown | ||||||
|
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Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Unspecified species | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Unknown | Unknown | ||||||
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Natural system modifications | Dams & water management/use - Dams (size unknown) | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Natural system modifications | Fire & fire suppression - Trend Unknown/Unrecorded | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
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Natural system modifications | Other ecosystem modifications | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
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Recommended citation
BirdLife International (2024) Species factsheet: Slender-billed Babbler Argya longirostris. Downloaded from
https://datazone.birdlife.org/species/factsheet/slender-billed-babbler-argya-longirostris 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.