Reproduction: Adult size is attained at about 5 years of age. The duration of
oestrus cycle is about 30 days. During breeding period the oestrus females come
closer to the males. The female gives birth to a single young after 6 months of
gestation. The birth weight of a young may be 400 g.
Behaviour: They may remain in troops ranging from 6 to as many as 70 individuals. The mixed troops have a stable unit of related females with usually just one breeding male. Females remain in the same location but young males leave the parental troop. The territorial and grooming behaviours are seen in langurs. Agonistic bebaviour for food is common among the members of langurs. In Central India, a mutual relationship between langur and cheetal has been observed in the wild.
Life span: Langurs are known to live 25-30 years.