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Description |
Geographic Range [top]
Range Description: Batrachostomus stellatus occurs from central peninsular Thailand, Sabah, Sarawak and Peninsular Malaysia, Singapore, Kalimantan (including the North Natuna Islands) and Sumatra (including the Riau and Lingga archipelagos and Bangka Island), Indonesia and Brunei, where it is fairly widespread and uncommon in suitable habitat (BirdLife International 2001, J. Eaton in litt. 2016).
Countries occurrence:
Native:
Brunei Darussalam; Indonesia; Malaysia; Thailand
Regionally extinct:
Singapore
Additional data:
? Continuing decline in area of occupancy (AOO): Unknown
? Extreme fluctuations in area of occupancy (AOO): No ? Estimated extent of occurrence (EOO) - km2: 2360000
? Continuing decline in extent of occurrence (EOO): Unknown ? Extreme fluctuations in extent of occurrence (EOO): No
? Continuing decline in number of locations: Unknown
? Extreme fluctuations in the number of locations: No
? Upper elevation limit (metres): 500
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: The global population size has not been quantified, but the species is described as not common (Cleere 1998).
Trend Justification: Forest destruction in the Sundaic lowlands of Indonesia has been extensive, and the situation is little different in Thailand and Malaysia, but this speciess ability to persist in regenerating and second growth habitats suggests it is probably not suffering more than a moderately rapid decline.
Current Population Trend: Decreasing
Additional data:
? Number of mature individuals: Unknown ? Continuing decline of mature individuals: Unknown
? Extreme fluctuations: No ? Population severely fragmented: No
? Continuing decline in subpopulations: Unknown
? Extreme fluctuations in subpopulations: No ? All individuals in one subpopulation: No
Habitat and Ecology [top]
Habitat and Ecology: It occurs in evergreen and secondary forest to at least 500 m (once to 920 m), although it is not found in heavily degraded habitats (J. Eaton in litt. 2016). It feeds on insects in the lower storeys of forest.
Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Unknown
Generation Length (years): 7.5
Movement patterns: Altitudinal Migrant
Threats [top]
Major Threat(s): Rates of forest loss in the Sundaic lowlands have been extremely rapid (Kalimantan lost nearly 25% of its evergreen forest during 1985-1997, and Sumatra lost almost 30% of its 1985 cover), because of a variety of factors, including the escalation of logging and land conversion, with deliberate targeting of all remaining stands of valuable timber including those inside protected areas, plus forest fires (particularly in 1997-1998).
Conservation Actions [top]
Conservation Actions: Conservation Actions Underway
No species-specific actions are known, although the species has been recorded from a number of protected areas within its range.
Conservation Actions Proposed
Protect areas of lowland forest within the speciess range. Enforce restrictions on agricultural encroachment and logging within such protected areas. Generate density estimates to inform a revised population estimate for the species. Estimate population trends by calculating rates of forest loss within its range using satellite imagery and remote sensing techniques.
Amended [top]
Amended reason: Edited Geographic Range and Habitats and Ecology Information text. Added new Contributors and new Facilitator/Compiler.
Citation: BirdLife International. 2017. Batrachostomus stellatus. (amended version published in 2016) The IUCN Red List of Threatened Species 2017: e.T22689600A110804132. http://dx.doi.org/10.2305/IUCN.UK.2017-1.RLTS.T22689600A110804132.en. Downloaded on 10 August 2017.
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