Please read my post on the State of the Wild (WCS 2010). The white-headed langur like the Indo-Chinese tiger and other tiger subspecies has been driven to near extinction in-part because of wildlife trafficking. Traditional Chinese Medicine continues to promote the practice of zootherapy. Zootherapeutic agents include parts and derivatives of whole carcasses, tissues and byproducts of wildlife. There are approximately 100 white-headed langurs left in the wild. One subspecies occurs in Cat Ba Island, Vietnam and the other in Guangxi, China. This partially albinistic langur was considered a subspecies of Francois’ langurs as recently as 1995. One day I may share my experience with captive Francois’ langurs. If I had to pick a favorite Old World monkey, I might just pick Francois’ langurs.
Dr. Jordan Schaul, Zoo Keeper Emeritus