Bengal Sacred Langur

The northern plains gray langur, also called the sacred or Hanuman langur, has mostly light-coloured fur with darker fur on the back and limbs, and a black face, ears, hands and feet. Adult males weigh 16.9 to 19.5kg and females 9.5 to 16.1kg, with a tail longer than the body. It is diurnal and both terrestrial and arboreal (Wikipedia, general species account).

Groups may hold several males and females, one male and several females, or males alone, and group size can exceed 100. Gestation is about 200 days and weaning at about a year. The account opened gives its range as a large part of India south of the Himalaya, and the Mammal Diversity Database lists India only, so its place in the Bhutan guide is flagged for checking.