VU
Bristled Grassbird Schoenicola striatus



Taxonomy

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.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - A2c+3c+4c; C2a(i)

Red List history
Year Category Criteria
2016 Vulnerable A2c+3c+4c;C2a(i)
2012 Vulnerable A2c+3c+4c;C2a(i)
2008 Vulnerable A2c; A3c; A4c; C2a(i)
2004 Vulnerable
2000 Vulnerable
1996 Vulnerable
1994 Vulnerable
1988 Threatened
Species attributes

Migratory status full migrant Forest dependency does not normally occur in forest
Land-mass type continent
Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 2,490,000 km2 medium
Extent of Occurrence (non-breeding) 1,270,000 km2 medium
Number of locations 11-100 -
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 2500-9999 mature individuals poor estimated 2000
Population trend decreasing poor suspected 2011-2022
Rate of change over the past 10 years/3 generations (longer of the two periods) 30-49% - - -
Rate of change over the future 10 years/3 generations (longer of the two periods) 30-49% - - -
Rate of change over the past & future 10 years/3 generations (longer of the two periods) 30-49% - - -
Generation length 3.6 years - - -
Number of subpopulations 2-100 - - -

Population justification: The population size of this species is difficult to estimate because it is easily overlooked outside of the breeding season. An analysis of detailed accounts in BirdLife International (2001) tentatively suggests that total population may number fewer than 10,000 individuals, and so it is placed in the band 2,500-9,999 mature individuals. This equates to 3,750-14,999 individuals, rounded here to 3,500-15,000 individuals.

Trend justification: A rapid and on-going decline is suspected, owing to the many active and continuing threats impacting the population.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Bangladesh extant native
India extant native yes
Nepal extant native yes
Pakistan extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
India Amboli-Tilari Reserve Forest
India Buxa Tiger Reserve (National Park)
India Deobali Jalah
India Harike Lake Bird Sanctuary
India Jhilmil Jheel Conservation Reserve
India Mahaveer Swami Wildlife Sanctuary (Lalitpur)
India Manas National Park
India Okhla Bird Sanctuary
India Orang National Park
India Satkosia Gorge Wildlife Sanctuary
India Surajpur wetland
Nepal Chitwan National Park
Nepal Farmlands in Lumbini area
Nepal Koshi Tappu Wildlife Reserve and Koshi Barrage
Nepal Sukla Phanta Wildlife Reserve

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Grassland Subtropical/Tropical Dry major breeding
Grassland Subtropical/Tropical Dry major non-breeding
Grassland Subtropical/Tropical Seasonally Wet/Flooded major breeding
Grassland Subtropical/Tropical Seasonally Wet/Flooded major non-breeding
Shrubland Subtropical/Tropical Moist major breeding
Shrubland Subtropical/Tropical Moist major non-breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable non-breeding
Altitude 0 - 460 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 Majority (50-90%) Rapid Declines Medium Impact: 7
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Small-holder grazing, ranching or farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact: 7
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Wood & pulp plantations - Agro-industry plantations Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
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
Stresses
Ecosystem degradation
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Mikania micrantha Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation
Natural system modifications Dams & water management/use - Abstraction of surface water (commercial use) Timing Scope Severity Impact
Ongoing Minority (<50%) Rapid Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Natural system modifications Dams & water management/use - Dams (size unknown) Timing Scope Severity Impact
Ongoing Minority (<50%) Rapid Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Natural system modifications Fire & fire suppression - Increase in fire frequency/intensity Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2024) Species factsheet: Bristled Grassbird Schoenicola striatus. Downloaded from https://datazone.birdlife.org/species/factsheet/bristled-grassbird-schoenicola-striatus 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.