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Order : PRIMATES
Family : Cercopithecidae
Species : Presbytis sumatranus
Head-body length : ? cm
Tail length : ? cm
Weight : ? kg
The Black Sumatran Langur inhabits a range of forested habitats including hill
forest, lowland primary and secondary forest, and highly disturbed shrub
forest in western and north-central Sumatra and parts of the east coast.
It was formerly considered a subspecies of the Mitred Langur Presbytis
melalophos, but Roos et al (2014) consider it to be a valid species in
its own right.
This langur feeds mainly on young leaves, but other vegetation may be
consumed including flower, seeds and forest fruits.
Fur colour can be quite variable.
The specimen illustrated here has distinctly bicoloured fur, with strong
demarcation between medium grey fur on the back and sides of its body, and
white fur on the chest and belly. This individual has a pronounced crest.
The distribution of this species is patchy, due to habitat loss and
conversion of forest to plantations.
The Black Sumatran Langur is endemic to the island of Sumatra, Indonesia.
Figs 1 and 2 : Adult specimen from Bukit Lawang, North Sumatra.
Fig 3 : Mixed forest habitat in North Sumatra close to the
location of the specimen in Figures 1 and 2.
Photos
thanks to Andrea Molyneaux.
References :
Roos, C., Boonratana, R.,
Supriatna, J., Fellowes,
J. R., Groves, C. P., Nash, S. D., Rylands, A. B & Mittermeier, R. A.
(2014). An updated taxonomy and conservation status review of Asian
primates. Asian Primates Journal : 4(1): 2-28.
Traeholt, C. & Setiawan, A. 2020. Presbytis sumatranus. The IUCN Red
List of Threatened Species 2020: e.T136912A17986913.
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