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White-chested Babbler Trichastoma rostratum

Justification
This species is listed as Near Threatened as it is likely to be declining moderately rapidly throughout its range as a result of habitat loss. Although it is restricted to lowland areas in which rates of deforestation are highest, it is also tolerant of secondary habitats, and is therefore likely to be at reduced risk.

Taxonomic source(s)
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.

Distribution and population
Trichastoma rostratum is known from the Sundaic lowlands, in south Tenasserim, Myanmar; peninsular Thailand; Singapore (rare); Sabah, Sarawak and peninsular Malaysia; Kalimantan (including northern islands) and Sumatra (including offshore islands), Indonesia, and Brunei. It is fairly common, though localised, throughout this range.

Population justification
The global population size has not been quantified, but the species is described as generally fairly common to common although uncommon in Sumatra and rare in Singapore (del Hoyo et al. 2007).

Trend justification
Declines are suspected to be occurring in response to rapid and widespread deforestation across many parts of the range. This species's tolerance of secondary and logged habitats suggests that these declines may not be severe at present.

Ecology
This species is found near water in lowland evergreen forest and secondary growth, as well as mangroves and peatswamp forest, up to 500 m. It has also been recorded in overgrown plantations, beach-strand scrub and stunted forest on islands. It is often regarded as a riverine forest specialist.

Threats
Rates of forest loss in the Sundaic lowlands have been extremely rapid, owing partly to the escalation of illegal logging and land conversion, with deliberate targeting of all remaining stands of valuable timber including those inside protected areas. Forest fires have also had a damaging effect (particularly in 1997-1998). The magnitude of these threats may be allayed by this species's tolerance of secondary growth and logged forest.

Conservation Actions Underway


Conservation Actions Proposed
Conduct repeated surveys within the range to assess its current distribution and abundance, as well as identify population trends and rates of habitat loss. Conduct ecological studies to improve understanding of its precise habitat requirements, tolerance of secondary habitats and response to fragmentation. Protect significant areas of suitable forest at key sites, in both strictly protected areas and community-led multiple use areas.

References
BirdLife International. 2001. Threatened birds of Asia: the BirdLife International Red Data Book. BirdLife International, Cambridge, U.K.

del Hoyo, J.; Elliott, A.; Christie, D. 2007. Handbook of the Birds of the World, vol. 12: Picathartes to Tits and Chickadees. Lynx Edicions, Barcelona, Spain.

Further web sources of information
Detailed species accounts from the Threatened birds of Asia: the BirdLife International Red Data Book (BirdLife International 2001).

Explore HBW Alive for further information on this species

Search for photos and videos, and hear sounds of this species from the Internet Bird Collection

Text account compilers
Butchart, S., Gilroy, J., Khwaja, N., Mahood, S.

IUCN Red List evaluators
Butchart, S., Symes, A.

Recommended citation
BirdLife International (2014) Species factsheet: Trichastoma rostratum. Downloaded from http://www.birdlife.org on 20/08/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 20/08/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Key facts
Current IUCN Red List category Near Threatened
Family Timaliidae (Babblers and parrotbills)
Species name author Blyth, 1842
Population size Unknown mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 356,000 km2
Country endemic? No
Links to further information
- Additional Information on this species