- Dicrurus sumatranus
29cm. A distinctive drongo:
- Tail nearly square-ended, outer rectrices straight or very slightly curving outwards
- Rather short bill
- Black plumage with deep ultramarine-blue gloss
- Small feathers at base of bill cover about two-third of lenght of bill
- Exaggerated rictal bristles, projecting nearly as far as tip of bill
- Red eye
Sexes similar, females are smaller. Juveniles undescribed.
Endemic to the mountains of Sumatra (Indonesia).
Widespread and locally common.
Two subspecies recongized:
- D. s. sumatranus in Batak Highlands and Barisan Range (from Aceh to Mount Kaba)
- D. s. viridinitens on Mentawai Islands, off western Sumatra
Has been considered conspecific with Hair-crested Drongo and belongs to a superspecies with Hair-crested Drongo, Sulawesi Drongo, Wallacean Drongo, Balicassiao, Spangled Drongo and Ribbon-tailed Drongo.
Submontane and lower montane primary forest or tall secondary forest. Occurs up to 800m, possibly up to 1500m.
Feeds on insects. Sallies from a perch and hawks its prey in air.
Often seen on vertical trunk with head up and tail pressed against bark like a woodpecker. Then it ascends in flitting hops to take ants.
Commonly in mixed-species flocks.
Few data about breeding. One bird was seen in early April feeding two nestling.
A resident species.
- Clements, JF. 2009. The Clements Checklist of Birds of the World. 6th ed., with updates to December 2009. Ithaca: Cornell Univ. Press. ISBN 978-0801445019.
- Del Hoyo, J, A Elliott, and D Christie, eds. 2009. Handbook of the Birds of the World. Volume 14: Bush-shrikes to Old World Sparrows. Barcelona: Lynx Edicions. ISBN 978-8496553507
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