113. Black-and-white Langur Presbytis bicolor French: Langur bicolore / German: SchwarzweiRer Kammlangur / Spanish: Langur bicolor Other common names: Bicolored Banded Langur, Bicolored Mitered Langur, Sumatran Langur Taxonomy. Presbytis melalophos bicolor Aimi & Bakar, 1992, Batang Kering 0° 50° S, 101° 23° E, 14 km north of Kiliranjao, West Sumatra. P. bicolor is aligned with P. melalophos on the basis of similarity of vocalizations and genetics but with P. femoralis or P. siamensis based on pelage color. It is separated from P. melalophos by the middle and lower Batang Hari River (although intergrading with it in foothills to the west), and from P. siamensis by the middle Inderagiri River. Monotypic. Distribution. EC Sumatra, from the Inderagiri River in the N to the Batang Hari River in the S, mainly in the highlands. Descriptive notes. Head-body 33-35.4 cm (males) and 33.9-38.2 cm (females), tail 64-72.5 cm (males) and 66-84 cm (females); weight 4.9-7.2 kg (males) and 5-1-8:5 kg (females). Main body color of the Black-and-white Langur is dark chocolate, extending down outer surfaces of arms. Upperpart of tail and outer surfaces of hindlimbs, hands, and feet are black. Throat, underside, inner surfaces of limbs, and undersurfaces oftail are white. Crest on crown has a black median stripe and a black tip. There is a black fringe of hair over forehead. Circumocular region is gray or bluishgray, muzzle is black, and chin is pinkish or gray. Habitat. Mainly hill rainforest. Food and Feeding. The diet of the Black-and-white Langur probably consists of young leaves, unripe fruits, flowers, mature leaves, and seeds. Breeding. Newborn Black-and-white Langurs are whitish-gray with a thick, dark dorsal stripe, and no shoulder cross-stripe. Activity patterns. The Black-and-white Langur is diurnal and arboreal. Movements, Home range and Social organization. Like other species of Presbytis, the Black-and-white Langur likely lives in one-male groups and defends exclusive territories. Status and Conservation. CITES Appendix II. Classified as Data Deficient on The [UCN Red List (as P. melolophos bicolor). The Black-and-white Langur is protected under Indonesian law. It occurs in Bukit Tigapuluh National Park. Further surveys and clarification are needed to assessits distribution and conservation status. Bibliography. Aimi & Bakar (1992, 1996), Brandon-Jones (1999), Brandon-Jones et al. (2004), Davies et al. (1988), Fleagle (1977), Groves (2001), Kawamura (1984), Meyer, Hodges et al. (2012), Meyer, Rinaldi et al. (2011), Mukhtar et al. (1990), Nijman & Manullang (2008), Zingeser (1970).

Published as part of Russell A. Mittermeier, Anthony B. Rylands & Don E. Wilson, 2013, Cercopithecidae, pp. 550-755 in Handbook of the Mammals of the World – Volume 3 Primates, Barcelona :Lynx Edicions on pages 718-719, DOI: 10.5281/zenodo.6867065