Justification This species is likely to be declining in line with habitat loss and degradation throughout its range. It is apparently tolerant of secondary and logged forests, suggesting that rates of decline are only likely to be moderately rapid. It is currently considered Near Threatened.

Family/Sub-family Dicruridae

Species name author Ramsay, 1880

Taxonomic source(s) Sibley and Monroe (1990, 1993)

Identification

Population estimate

Population trend

Range estimate (breeding/resident)

Country endemic?

decreasing

-

Yes

Range & population Dicrurus sumatranus is restricted to Sumatra (with race viridinitens on the Mentawai Islands), Indonesia. It is fairly widespread, and has been described as a relatively common member of mixed species foraging parties in mid-elevation forests.

Ecology: This species occurs in lowland, hill and lower montane forest and tall secondary forest up to 800 m, and possibly to 1,500 m. It has been recorded (rarely) in Way Kambas National Park (highest point 16 m), but appears to be more common at mid altitudes. It regularly joins mixed species foraging parties.

Threats Loss of lowland forest in Sumatra has been extensive as a result of both regulated and illegal logging, as well as conversion to agriculture.

Conservation measures proposed Conduct repeated surveys within the range to determine current distribution and abundance, as well as assess 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 areas of suitable habitat and safeguard against logging and agricultural encroachment.

References BirdLife International (2001).

Further web sources of information

Fully detailed species accounts from the Threatened birds of Asia: the BirdLife International Red Data Book (BirdLife International 2001), together with new information collated since the publication of the Red Data Book

Text account compilers Phil Benstead (BirdLife International), James Gilroy (BirdLife International)

IUCN Red List evaluators Phil Benstead (BirdLife International), Stuart Butchart (BirdLife International), James Gilroy (BirdLife International), Alison Stattersfield (BirdLife International)

Recommended citation BirdLife International (2009) Species factsheet: Dicrurus sumatranus. Downloaded from http://www.birdlife.org on 9/2/2010

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

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