Reproduction: The sexual maturity is about 6-7 years (male). Females are
monogamous. They mate at the beginning of the rainy season. The female gives
birth between December and March after 7-8 months of gestation period. The
young remain with the mother for about 6 years.
Behaviour: They are active at morning and evening and are reputed for making peculiar calls in chorus. Hoolock gibbons are timid and inoffensive. These diurnal animals live in small troops. They are known to have a special liking for spiders.
Life span: In the wild hoolock gibbons have been reported to live for 25-30 years.