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Sumatran Drongo Dicrurus sumatranus

Justification
This species is suspected to be in decline owing to 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 therefore currently considered Near Threatened.

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
Dicrurus sumatranus is restricted to Sumatra (with race viridinitens on the Mentawai Islands), Indonesia (BirdLife International 2001). It is fairly widespread, and has been described as a relatively common member of mixed species foraging parties in mid-elevation forests.

Population justification
The population size of this species has not been quantified, but it is described as locally relatively common.

Trend justification
Data on trends are lacking, but continuing habitat loss within the species's range suggests that a moderately rapid population decline is likely to be occurring.

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
The 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 Actions Underway
No targeted conservation actions are known for this species.

Conservation Actions Proposed
Conduct repeated surveys within the species's 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. Threatened birds of Asia: the BirdLife International Red Data Book. BirdLife International, Cambridge, U.K.

del Hoyo, J.; Elliott, A.; Christie, D. 2009. Handbook of the Birds of the World, vol. 14: Bush-shrikes to Old World Sparrows. 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
Benstead, P., Gilroy, J., Taylor, J.

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

Recommended citation
BirdLife International (2014) Species factsheet: Dicrurus sumatranus. Downloaded from http://www.birdlife.org on 31/10/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 31/10/2014.

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 Dicruridae (Drongos)
Species name author Ramsay, 1880
Population size Unknown mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 396,000 km2
Country endemic? Yes
Links to further information
- Additional Information on this species