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- Thirteen primate species inhabit Vietnam.
- Seven are endangered.
- Pygathrix nemaeus one of the most endangered.
- The red-shanked Douc langur (P. n. nemaeus) is one of five colobine monkey species found only in Vietnam and Laos.
- The distribution of the Douc langur is from Nghe An Province in the north to Tay Ninh Province in the south (500-1000m altitude).
- Little information about status in Laos but estimated in the thousands (Duckworth, personal communication to Nadler).
- Numbers are much higher than those for Vietnam.
- The black-shanked douc (P. n. nigripes) is found in southern Vietnam and Cambodia.
- Da Lat/Di Linh Plateau in South Vietnam is the center of its distribution.
- The grey-shanked douc (P. n.cinereus) is found in the southern part of the Annam Highlands (an area isolated from the other 2 subspecies)
- Subspecies occur together (are sympatric) throughout Vietnam's Central Highlands.
- Recent surveys have found them to be widespread and occupying a variety of habitats
- Multiple types of primary and secondary forest habitats: Semi evergreen hill forests, submontane evergreen forests, mixed deciduous forests, mixed evergreen podocarp forests, mosaics of primary evergreen forests, and closed broadleaved tropical forests.
- Medium and high altitudes.
Douc Langers Distribution
Lippold (1998, 1999)
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