Northern plains gray langur

[6][7] It is thought to have been introduced to western Bangladesh by Hindu pilgrims on the bank of the Jalangi River.

[6][7] The northern plains gray langur eats primarily fruits and leaves.

[6] It also eats seeds, flowers, buds, bark and insects, including caterpillars.

[6] It is also fed fruits and vegetables by humans, and some groups get a substantial portion of their diets from food provided by temples and from raiding crops.

[6] The northern plains gray langur often associates with chital deer.

[7] It is subject to some threats, including road kill, attacks by dogs, forest fires and diseases caught from domestic animals.

[2][7] It is sometimes hunted for food, especially within the states of Odisha and Andhra Pradesh and is sometimes killed by humans to prevent it from raiding crops.

[2] Captive gray langurs are used in Delhi to scare off rhesus macaques, which steal from and sometimes attack people.

Family perched on concrete ledge
Mother breastfeeding infant in Ranthambore National Park
A captive gray langur. According to the Indian Wildlife (Protection) Act, it is illegal to hold the species in captivity.
Late 19th century lithograph from Bengal, depicting Rama & Sita enthroned, surrounded by Lakshmana , Bharata , Shatrughna & Vibhishana . A notable feature of Bengal art is depiction of Hanuman based on the anthropomorphised version of the native grey langur species, as opposed to that based on the rhesus macaque native to upper Gangetic plains & Jambavan based on the Himalayan black bear .
Kalighat painting of the same period depicting Hanuman (whose appearance is based on the grey langur) being taken captive by Lava & Kusha , an event from the Uttarakanda of the Hindu epic Ramayana .