Hose's langur  (Presbytis hosei)

Arboreal: Living in trees.
Bezoar: A ball of swallowed foreign material (usually hair or fiber) that cannot be digested and collects in the stomach.
Diurnal: Active during the day.
Endemic: A species or taxonomic group that is only found in one particular country or geographic area.
Folivorous: Leaf eating.
Natal: Site or group of birth.
Polygynous: In animals, a pattern of mating in which a male has more than one female partner.
Sacculated: Formed with or having saclike expansions.

1. IUCN Red List (June, 2009)
   http://www.redlist.org
   
2. Richardson, M. (2006) Pers. Comm.
   
3. The Primata (January, 2006)
   http://www.theprimata.com/presbytis_hosei.html
   
4. CITES (November, 2005)
   http://www.cites.org
   
5. Paleaorama.com (January, 2006)
   http://www.paleorama.com/Mammals-P/Presbytis.php
   
6. Primates in Peril: The World's 25 Most Endangered Primates 2004 – 2006 (January, 2006)
   http://portals.conservation.org/downloads/storedfile/Document/top252004final.pdf
   
7. Forest Department Sarawak (January, 2006)
   http://www.forestry.sarawak.gov.my/forweb/wildlife/mgmt/tpa/tprotsp.htm
   
8. Nijman, V. (2005) Decline of the endemic Hose's langur Presbytis hosei in Kayan Mentarang National Park, East Borneo. Oryx, 39: 223 - 226.