Parrot Deaths Highlight Urgent Need to Reform CITES

Three critically endangered African Grey parrots were seized in Norway in 2019 after being illegally smuggled and they were later euthanised. These intelligent birds had potentially 60 years of life to live and the massive tragedy is – they knew that they were going to die!

Generally, international wildlife trade is not forbidden. Rather, it is regulated through CITES an international treaty to prevent illegal trade in wild animals. The industry is worth billions. The treaty needs a radical overhaul writes Professor Ragnhild Sollund for 360Info.

The legal trade is largely to blame for African grey parrots becoming endangered: parrots make popular pets due to their intelligence and sociability, so they have become “over exploited”. Help fight illegal wildlife trade and #Boycott4Wildlife

The tragedy of dead African grey #parrots highlights the need to overhaul #CITES a weak treaty which facilitates rather than stops #wildlife trade #extinction by Prof Ragnild Sollund for @360info_global #Boycottpalmoil #Boycott4Wildlife via @palmoildetect wp.me/pcFhgU-78q

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“A #ban on #wildlife #trade would be easier to enforce than the current market, where some trade is legal, some illegal, and which offers ample possibilities for #fraud #corruption Story: @360info_global #Boycottpalmoil #Boycott4Wildlife @palmoildetect wp.me/pcFhgU-78q

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Originally published under Creative Commons by 360info™. Written by Professor Ragnhild Sollund. Read the original here.

In November 2019, three African grey parrot chicks (Psittacus erithacus) were seized at Oslo airport by customs inspectors. As endangered species, they did not have the required permits to be transported to Norway. During the month that officials contemplated what should happen to the birds, they were hand reared by veterinarians. Then the decision was made: euthanasia.

These highly intelligent birds had a potential 60-year life ahead of them; a life that was abruptly concluded in the hands of the vet. “I have euthanised many animals, but I cried when I euthanised these birds,” she said. “They understood… [And I did] not want to work as the Norwegian environment agency’s executioner of endangered species.”

In Norway, this was the standard outcome for illegally traded animals that are listed in CITES, the United Nations Convention on International Trade in Endangered Species of Wild Fauna and Flora. On March 3, International Wildlife Day, it highlights why addressing the wildlife trade, its regulation and enforcement, is urgent.

Generally, international wildlife trade is not forbidden. Rather, it is regulated through CITES. The legal trade is largely to blame for African grey parrots becoming endangered: parrots make popular pets due to their intelligence and sociability, so they have become “over exploited”, meaning the trade endangers the survival of the species. But the concept of over exploitation fails to cover the individual suffering or death of the animals involved in the trade. In view of species justice, any exploitation may be too much.

CITES entered into force in 1975. Eighty-four parties have signed the convention, including the European Union as one party. Each country must have a management authority, and all countries are obliged to submit annual reports to the CITES secretariat.

Animals are listed on three appendices of CITES, according to how endangered they are. The African grey is listed on appendix I as threatened with extinction. It was moved from appendix II in 2016, since trade in them was no longer deemed ‘sustainable’. Currently 5,950 species of animals and 32,800 species of plants are listed across all three appendices.

CITES has been criticised for being an overly human-centred convention. It fails to take into consideration the fact that animals are sentient beings with capacity to suffer who have interest in living their lives in their natural habitats, free from human inflicted harm.

Instead, CITES frames wildlife species, whether plants or animals, as resources that are available for humans to exploit, until exploitation reaches a level that threatens the survival of a species. According to this logic, one individual can easily be disposed of and replaced by another; an individual’s intrinsic value is not recognised.

CITES has been criticised for not functioning even within its own parameters. For example, many parties to CITES never submit the required annual reports, and much trade is never recorded. And many species become threatened and go extinct from trade without ever being listed on the CITES appendices. For example, there are 10,247 known reptile species in the world, but only 8 percent of the reptile trade is regulated through CITES. Newly discovered species can be swiftly exploited, and 79 percent of traded species are not subject to CITES regulation.

According to CITES records, a staggering 2 million mammals, 5 million birds, 41 million reptiles, half a million amphibians, and 6 million fish were traded legally between 2011-2022.

Animals are used for medicinal purposes (often with no effect), fashion, as game hunting trophies, pets and as high-status food items.

Wildlife trade is big business

Advocacy group Traffic estimates the economic value of legal wildlife trade including plants, at approximately US$323 billion. One important reason for the foundation of CITES was to secure the economic gains of wildlife trade for biodiverse, but poor countries in the global South.

Wildlife trade can be viewed as transnational, global, organised state corporate harm.

Given the general failure of CITES to protect animals from harm and species from extinction, there have been many calls to remodel the agreement. The logic behind CITES implies that the harms of wildlife trade shall continue relentlessly, with new individuals abducted, killed or in other ways exploited in a ‘sustainable’ way for human benefit.

A better CITES would be based around animal protection. Wild animals should have rights not to be exploited as pets, killed for their flesh or skin, teeth or whiskers, tusks, horns, or used for entertainment in zoos, circuses and aqua parks. CITES could rather become an instrument promoting justice both for nature, humans and animals.

One way to do this would be to transform it from a trade convention to an aid convention. The convention could be reformulated to promote species conservation and the protection of individuals’ and species’ rights.

CITES could then become an instrument to funnel economic resources from rich economies in the North to poor economies in the South, if their national budgets partly rely on wildlife trade. Aid, distributed by an accountable secretariat, could be conditional on the ways in which the recipients succeed in protecting the natural environment and its inhabitants.

This system is already in place when it comes to the protection of rainforest: Norway and Germany contribute significantly to the protection of rainforest in places such as Brazil, Colombia and Ecuador through the UN; the amount of economic resources allocated from Norway to these countries depends on how much rainforest is spared from logging and emissions reduced.

A ban on the trade in wild animals would be easier to enforce than the current murky market, in which some trade is legal, other parts illegal, and which demands significant skills by law enforcement officers and offers ample possibilities for fraud.

Ragnhild Sollund is professor at the Department of Criminology and Sociology of Law at the University of Oslo, where she has done research into the wildlife trade for 12 years. She is currently leading the research project: Criminal Justice, Wildlife Conservation and Animal Rights in the Anthropocene, which studies the implementation and enforcement of two nature conventions: CITES; and the Bern convention that protects wild animals and their habitats in Europe, in Norway, The United Kingdom, Spain and Germany. Her research is funded by Norwegian Research Council.

Originally published under Creative Commons by 360info™. Written by Professor Ragnhild Sollund. Read the original here.

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2026-01-10 15:56:00

Capped Langur Trachypithecus pileatus

Capped Langur Trachypithecus pileatus

IUCN Red List Status: Vulnerable

Location: India, Bhutan, Bangladesh, Myanmar

This species inhabits subtropical and tropical dry forests, primarily in the foothills and highlands south of the Brahmaputra River and across fragmented patches in northeastern South Asia.

The capped #langur (Trachypithecus pileatus) is a graceful and beautiful leaf #monkey found across northeastern #India, #Bhutan, #Bangladesh, and #Myanmar. Sadly, they are listed as #Vulnerable on the IUCN Red List due to rapid population declines from #deforestation, logging, agriculture, and the devastating impacts of #palmoil plantations. Once widespread, their numbers have nearly halved in some regions like Assam due to the accelerating loss of native forest cover. Directly threatened by palm oil and monoculture expansion, this species is now confined to small, isolated forest fragments. Take action every time you shop and #BoycottPalmOil #Boycott4Wildlife

youtu.be/NhpTmfZuNV4

In the forests of #Bangladesh 🇧🇩 and northern #India 🇮🇳 lives a remarkable #primate with soulful hazel eyes 🐵🐒 on the verge of #extinction from #palmoil #deforestation. Help the Capped #Langur and #Boycottpalmoil 🌴🔥🚫 #Boycott4Wildlife @palmoildetect palmoildetectives.com/2026/01/…

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The intelligent and social Capped #Langur 🙉🐒🐵 is under pressure from #palmoil #deforestation and hunting in #India 🇮🇳 Troops are interbreeding with Phayre’s #langurs to survive. Fight for them and #Boycottpalmoil 🌴☠️❌ #Boycott4Wildlife @palmoildetect palmoildetectives.com/2026/01/…

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Appearance & Behaviour

With their black-tufted crown, pale fur, and soulful eyes, capped langurs are among the most visually distinctive primates in the Eastern Himalayas. Their fur ranges from silver-grey to golden orange, with darker limbs and a black cap that gives them their name. They move gracefully through the canopy, rarely descending to the forest floor except for play or social grooming.

Capped langurs live in unimale, multifemale groups with sizes ranging from 8 to 15 individuals. They spend most of their time feeding (up to 67%) or resting (up to 40%), engaging in complex social grooming and vocal communication. Daily movements range from 320–800 metres across fragmented habitats of 21–64 hectares. Grooming is an important social activity, with females often taking turns in allomothering behaviour.

Threats

Palm oil, teak and rubber monoculture plantations

The spread of oil palm and other monoculture crops such as teak and rubber is destroying the capped langur’s native forests at an alarming rate. These industrial plantations eliminate the diverse tree species that capped langurs rely on for food and shelter, leaving them with little to survive on. Once a landscape is cleared and replaced with palm oil or other single crops, it becomes a green desert devoid of biodiversity, pushing the species closer to extinction. In regions like Assam and Bangladesh, palm oil is a major driver of habitat fragmentation and degradation, especially in forest corridors that once connected populations.

Timber deforestation

Widespread illegal logging, often fuelled by demand for timber and firewood, is rapidly eroding the capped langur’s habitat. Fruiting and lodging trees that are vital to their survival are cut down, leaving forests patchy and disconnected. As their home ranges shrink, capped langur groups are forced into smaller fragments, increasing their vulnerability to predators, food shortages, and inbreeding. In some areas, this pressure has led to local extinctions or the collapse of entire populations.

Slash-and-burn agriculture

Slash-and-burn agriculture destroys habitat for capped langurs and often brings them into closer contact with human settlements, increasing conflict and risk of hunting or roadkill. Forest recovery from this can take decades—time the capped langur simply doesn’t have.

Hunting and the illegal pet trade

Capped langurs are hunted for their meat, pelts, and for sale in the illegal pet trade. In many tribal and rural areas of Assam, Arunachal Pradesh, and Manipur, they are still targeted despite legal protections. Their pelts are used to make traditional knife sheaths, and infants are often captured after killing their mothers, then sold as pets. This exploitation causes severe suffering and has a devastating impact on group structures, leading to long-term population decline.

Roads cut into rainforests for mines and tea plantations

As forests are cut into smaller patches for roads, mining, tea plantations, and settlements, capped langur populations become increasingly isolated. Small, disconnected populations face higher risks of inbreeding, loss of genetic diversity, and eventual extinction. In some regions, such as Tinsukia and Sonitpur, populations have already disappeared due to this fragmentation. The collapse of corridors also disrupts daily movement, feeding patterns, and access to mates—placing enormous stress on surviving individuals.

Hybridisation with other species

Due to the rapid degradation of natural habitats, capped langurs are increasingly forming mixed-species groups with the closely related Phayre’s langur (Trachypithecus phayrei). Recent studies in northeast Bangladesh confirm genetically that hybridisation is occurring, which could result in the eventual cyto-nuclear extinction of the capped langur lineage. Although hybridisation can happen naturally, in this case it is being driven by human-induced fragmentation, forcing species into overlapping territories with fewer options for mates. This phenomenon is both a symptom and a driver of their decline, complicating conservation efforts.

Mining, infrastructure, and political conflict

Open-cast coal mining, limestone extraction, and petroleum exploration have all contributed to the destruction of capped langur habitat across Assam and Nagaland. Infrastructure projects, such as highways and border fences, not only destroy habitat directly but also block animal movements and isolate populations. In border regions, armed conflict and territorial skirmishes have already extirpated capped langurs from several reserves, such as the Nambhur and Rengma forests. Weak law enforcement allows habitat destruction to continue unchecked in many regions.

Geographic Range

Capped langurs are found in northeastern India (Arunachal Pradesh, Assam, Meghalaya, Nagaland, Manipur, Mizoram, and Tripura), Bhutan, northwestern Myanmar, and northeastern and central Bangladesh. They occur at elevations from 10 to 3,000 metres across hill forests, riverine reserves, and protected areas. However, their range is now severely fragmented by human development, with some populations disappearing from former strongholds due to mining, conflict, and agricultural encroachment.

Diet

Primarily folivorous, the capped langur’s diet includes mature and young leaves, petioles, seeds, flowers, bamboo shoots, bark, and occasionally caterpillars. They forage on more than 43 plant species, with favourites including banyan (Ficus benghalensis), sacred fig (Ficus religiosa), Terminalia bellerica, and Mallotus philippensis. Seasonal availability influences their feeding patterns, but they consistently prefer fruiting and flowering trees.

Mating and Reproduction

Breeding usually occurs in the dry season, with birthing concentrated between late December and May. The gestation period lasts about 200 days, and the interbirth interval is approximately two years. Only parous females participate in allomothering, allowing new mothers time to forage and recover, a behaviour rare among langurs and considered a form of altruism.

FAQs

How many capped langurs are left in the wild?

Exact numbers are uncertain, but estimates suggest the population in Assam has declined from 39,000 in 1989 to approximately 18,600 between 2008 and 2014 (Choudhury, 2014). This halving reflects habitat loss and increasing fragmentation, particularly in Upper Assam and the Barak Valley.

What is the average lifespan of a capped langur?

While data is limited, langurs of this genus generally live 20–25 years in the wild. Captive lifespans may extend slightly due to the absence of predators and constant food supply, though such conditions often lead to stress.

Why are capped langurs under threat?

Their decline is due to relentless deforestation, palm oil and monoculture plantations, illegal logging, and road-building. Slash-and-burn agriculture and mining also play a major role. Capped langurs are hunted in some regions for meat, pelts, and as pets, particularly in Assam, Arunachal Pradesh, and Nagaland.

Do capped langurs make good pets?

Absolutely not. Capped langurs are intelligent, social beings that rely on complex forest habitats and close-knit family groups. Removing them from the wild fuels extinction and causes immense trauma. Many die during illegal capture and transport. Keeping them as pets is a selfish act that destroys lives. If you care about capped langurs, never support the exotic pet trade!

What are the major conservation challenges for capped langurs?

The biggest issues are hybridisation with other primate species, habitat fragmentation, palm oil expansion, and human-wildlife conflict. The 2018 study in Satchari National Park found that local attitudes toward conservation vary by occupation, education, and gender, which means education and outreach are crucial. A big challenge is the rise in hybridisation with sympatric Phayre’s langurs, driven by habitat degradation—this poses long-term genetic risks (Ahmed et al., 2024).

Take Action!

Capped langurs are vanishing before our eyes, driven to the brink by out-of-control palm oil expansion, deforestation, and development. You can help save them.

Refuse to buy products made with palm oil. Support indigenous-led conservation in northeast India and the Eastern Himalayas. Demand governments halt the destruction of old-growth forests and restore wildlife corridors. Spread awareness and challenge the illegal wildlife trade. #BoycottPalmOil #Boycott4Wildlife #Vegan #BoycottMeat

Support the Capped Langur by going vegan and boycotting palm oil in the supermarket, it’s the #Boycott4Wildlife

Support the conservation of this species

This animal has no protections in place. Read about other forgotten species here. Create art to support this forgotten animal or raise awareness about them by sharing this post and using the #Boycottpalmoil #Boycott4Wildlife hashtags on social media. Also you can boycott palm oil in the supermarket.

Further Information

Ahmed, T., Hasan, S., Nath, S., Biswas, S., et al. (2024). Mixed-Species Groups and Genetically Confirmed Hybridization Between Sympatric Phayre’s Langur (Trachypithecus phayrei) and Capped Langur (T. pileatus) in Northeast Bangladesh. International Journal of Primatology, 46(1), 210–228. doi.org/10.1007/s10764-024-004…

Das, J., Chetry, D., Choudhury, A.U., & Bleisch, W. (2020). Trachypithecus pileatus (errata version published in 2021). The IUCN Red List of Threatened Species 2020: e.T22041A196580469. dx.doi.org/10.2305/IUCN.UK.202…

Hasan, M.A.U., & Neha, S.A. (2018). Group size, composition and conservation challenges of capped langur (Trachypithecus pileatus) in Satchari National Park, Bangladesh. Retrieved from researchgate.net/publication/3…

Wikipedia. (n.d.). Capped langur. Retrieved April 6, 2025, from en.wikipedia.org/wiki/Capped_l…

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Take Action in Five Ways

1. Join the #Boycott4Wildlife on social media and subscribe to stay in the loop: Share posts from this website to your own network on Twitter, Mastadon, Instagram, Facebook and Youtube using the hashtags #Boycottpalmoil #Boycott4Wildlife.

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Join 3,173 other subscribers

2. Contribute stories: Academics, conservationists, scientists, indigenous rights advocates and animal rights advocates working to expose the corruption of the palm oil industry or to save animals can contribute stories to the website.

Wildlife Artist Juanchi Pérez

Read more

Mel Lumby: Dedicated Devotee to Borneo’s Living Beings

Read more

Anthropologist and Author Dr Sophie Chao

Read more

Health Physician Dr Evan Allen

Read more

The World’s Most Loved Cup: A Social, Ethical & Environmental History of Coffee by Aviary Doert

Read more

How do we stop the world’s ecosystems from going into a death spiral? A #SteadyState Economy

Read more

3. Supermarket sleuthing: Next time you’re in the supermarket, take photos of products containing palm oil. Share these to social media along with the hashtags to call out the greenwashing and ecocide of the brands who use palm oil. You can also take photos of palm oil free products and congratulate brands when they go palm oil free.

twitter.com/CuriousApe4/status…

twitter.com/PhillDixon1/status…

twitter.com/mugabe139/status/1…

4. Take to the streets: Get in touch with Palm Oil Detectives to find out more.

5. Donate: Make a one-off or monthly donation to Palm Oil Detectives as a way of saying thank you and to help pay for ongoing running costs of the website and social media campaigns. Donate here

Pledge your support

---

Learn about other animals endangered by palm oil and other agriculture

Global
South America
S.E. Asia
India
Africa
West Papua & PNG

Mountain Tapir Tapirus pinchaque

Keep reading

Saola Pseudoryx nghetinhensis

Keep reading

Tucuxi Sotalia fluviatilis

Keep reading

Frill-Necked Lizard Chlamydosaurus kingii

Keep reading

Grey Crowned Crane Balearica regulorum

Keep reading

Ecuadorean Viscacha Lagidium ahuacaense

Keep reading

---

Learn about “sustainable” palm oil greenwashing

Read more about RSPO greenwashing

Lying
Fake labels
Indigenous Land-grabbing
Human rights abuses
Deforestation
Human health hazards

A 2019 World Health Organisation (WHO) report into the palm oil industry and RSPO finds extensive greenwashing of palm oil deforestation and the murder of endangered animals (i.e. biodiversity loss)

Read more

---

#animals #Assam #Bangladesh #Bantrophyhunting #Bhutan #Boycott4wildlife #BoycottMeat #BoycottPalmOil #CappedLangurTrachypithecusPileatus #deforestation #extinction #ForgottenAnimals #humanWildlifeConflict #hunting #illegalPetTrade #India #langur #Langurs #mining #monkey #monkeys #Myanmar #PalmOil #palmOilDeforestation #palmoil #PhayreSLeafMonkeyTrachypithecusPhayrei #poaching #Primate #vegan #vulnerable #VulnerableSpecies

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Capped Langur Trachypithecus pileatus

Capped Langur Trachypithecus pileatus

IUCN Red List Status: Vulnerable

Location: India, Bhutan, Bangladesh, Myanmar

This species inhabits subtropical and tropical dry forests, primarily in the foothills and highlands south of the Brahmaputra River and across fragmented patches in northeastern South Asia.

The capped #langur (Trachypithecus pileatus) is a graceful and beautiful leaf #monkey found across northeastern #India, #Bhutan, #Bangladesh, and #Myanmar. Sadly, they are listed as #Vulnerable on the IUCN Red List due to rapid population declines from #deforestation, logging, agriculture, and the devastating impacts of #palmoil plantations. Once widespread, their numbers have nearly halved in some regions like Assam due to the accelerating loss of native forest cover. Directly threatened by palm oil and monoculture expansion, this species is now confined to small, isolated forest fragments. Take action every time you shop and #BoycottPalmOil #Boycott4Wildlife

youtu.be/NhpTmfZuNV4

In the forests of #Bangladesh 🇧🇩 and northern #India 🇮🇳 lives a remarkable #primate with soulful hazel eyes 🐵🐒 on the verge of #extinction from #palmoil #deforestation. Help the Capped #Langur and #Boycottpalmoil 🌴🔥🚫 #Boycott4Wildlife @palmoildetect palmoildetectives.com/2026/01/…

Share to BlueSky
Share to Twitter

The intelligent and social Capped #Langur 🙉🐒🐵 is under pressure from #palmoil #deforestation and hunting in #India 🇮🇳 Troops are interbreeding with Phayre’s #langurs to survive. Fight for them and #Boycottpalmoil 🌴☠️❌ #Boycott4Wildlife @palmoildetect palmoildetectives.com/2026/01/…

Share to BlueSky
Share to Twitter

Appearance & Behaviour

With their black-tufted crown, pale fur, and soulful eyes, capped langurs are among the most visually distinctive primates in the Eastern Himalayas. Their fur ranges from silver-grey to golden orange, with darker limbs and a black cap that gives them their name. They move gracefully through the canopy, rarely descending to the forest floor except for play or social grooming.

Capped langurs live in unimale, multifemale groups with sizes ranging from 8 to 15 individuals. They spend most of their time feeding (up to 67%) or resting (up to 40%), engaging in complex social grooming and vocal communication. Daily movements range from 320–800 metres across fragmented habitats of 21–64 hectares. Grooming is an important social activity, with females often taking turns in allomothering behaviour.

Threats

Palm oil, teak and rubber monoculture plantations

The spread of oil palm and other monoculture crops such as teak and rubber is destroying the capped langur’s native forests at an alarming rate. These industrial plantations eliminate the diverse tree species that capped langurs rely on for food and shelter, leaving them with little to survive on. Once a landscape is cleared and replaced with palm oil or other single crops, it becomes a green desert devoid of biodiversity, pushing the species closer to extinction. In regions like Assam and Bangladesh, palm oil is a major driver of habitat fragmentation and degradation, especially in forest corridors that once connected populations.

Timber deforestation

Widespread illegal logging, often fuelled by demand for timber and firewood, is rapidly eroding the capped langur’s habitat. Fruiting and lodging trees that are vital to their survival are cut down, leaving forests patchy and disconnected. As their home ranges shrink, capped langur groups are forced into smaller fragments, increasing their vulnerability to predators, food shortages, and inbreeding. In some areas, this pressure has led to local extinctions or the collapse of entire populations.

Slash-and-burn agriculture

Slash-and-burn agriculture destroys habitat for capped langurs and often brings them into closer contact with human settlements, increasing conflict and risk of hunting or roadkill. Forest recovery from this can take decades—time the capped langur simply doesn’t have.

Hunting and the illegal pet trade

Capped langurs are hunted for their meat, pelts, and for sale in the illegal pet trade. In many tribal and rural areas of Assam, Arunachal Pradesh, and Manipur, they are still targeted despite legal protections. Their pelts are used to make traditional knife sheaths, and infants are often captured after killing their mothers, then sold as pets. This exploitation causes severe suffering and has a devastating impact on group structures, leading to long-term population decline.

Roads cut into rainforests for mines and tea plantations

As forests are cut into smaller patches for roads, mining, tea plantations, and settlements, capped langur populations become increasingly isolated. Small, disconnected populations face higher risks of inbreeding, loss of genetic diversity, and eventual extinction. In some regions, such as Tinsukia and Sonitpur, populations have already disappeared due to this fragmentation. The collapse of corridors also disrupts daily movement, feeding patterns, and access to mates—placing enormous stress on surviving individuals.

Hybridisation with other species

Due to the rapid degradation of natural habitats, capped langurs are increasingly forming mixed-species groups with the closely related Phayre’s langur (Trachypithecus phayrei). Recent studies in northeast Bangladesh confirm genetically that hybridisation is occurring, which could result in the eventual cyto-nuclear extinction of the capped langur lineage. Although hybridisation can happen naturally, in this case it is being driven by human-induced fragmentation, forcing species into overlapping territories with fewer options for mates. This phenomenon is both a symptom and a driver of their decline, complicating conservation efforts.

Mining, infrastructure, and political conflict

Open-cast coal mining, limestone extraction, and petroleum exploration have all contributed to the destruction of capped langur habitat across Assam and Nagaland. Infrastructure projects, such as highways and border fences, not only destroy habitat directly but also block animal movements and isolate populations. In border regions, armed conflict and territorial skirmishes have already extirpated capped langurs from several reserves, such as the Nambhur and Rengma forests. Weak law enforcement allows habitat destruction to continue unchecked in many regions.

Geographic Range

Capped langurs are found in northeastern India (Arunachal Pradesh, Assam, Meghalaya, Nagaland, Manipur, Mizoram, and Tripura), Bhutan, northwestern Myanmar, and northeastern and central Bangladesh. They occur at elevations from 10 to 3,000 metres across hill forests, riverine reserves, and protected areas. However, their range is now severely fragmented by human development, with some populations disappearing from former strongholds due to mining, conflict, and agricultural encroachment.

Diet

Primarily folivorous, the capped langur’s diet includes mature and young leaves, petioles, seeds, flowers, bamboo shoots, bark, and occasionally caterpillars. They forage on more than 43 plant species, with favourites including banyan (Ficus benghalensis), sacred fig (Ficus religiosa), Terminalia bellerica, and Mallotus philippensis. Seasonal availability influences their feeding patterns, but they consistently prefer fruiting and flowering trees.

Mating and Reproduction

Breeding usually occurs in the dry season, with birthing concentrated between late December and May. The gestation period lasts about 200 days, and the interbirth interval is approximately two years. Only parous females participate in allomothering, allowing new mothers time to forage and recover, a behaviour rare among langurs and considered a form of altruism.

FAQs

How many capped langurs are left in the wild?

Exact numbers are uncertain, but estimates suggest the population in Assam has declined from 39,000 in 1989 to approximately 18,600 between 2008 and 2014 (Choudhury, 2014). This halving reflects habitat loss and increasing fragmentation, particularly in Upper Assam and the Barak Valley.

What is the average lifespan of a capped langur?

While data is limited, langurs of this genus generally live 20–25 years in the wild. Captive lifespans may extend slightly due to the absence of predators and constant food supply, though such conditions often lead to stress.

Why are capped langurs under threat?

Their decline is due to relentless deforestation, palm oil and monoculture plantations, illegal logging, and road-building. Slash-and-burn agriculture and mining also play a major role. Capped langurs are hunted in some regions for meat, pelts, and as pets, particularly in Assam, Arunachal Pradesh, and Nagaland.

Do capped langurs make good pets?

Absolutely not. Capped langurs are intelligent, social beings that rely on complex forest habitats and close-knit family groups. Removing them from the wild fuels extinction and causes immense trauma. Many die during illegal capture and transport. Keeping them as pets is a selfish act that destroys lives. If you care about capped langurs, never support the exotic pet trade!

What are the major conservation challenges for capped langurs?

The biggest issues are hybridisation with other primate species, habitat fragmentation, palm oil expansion, and human-wildlife conflict. The 2018 study in Satchari National Park found that local attitudes toward conservation vary by occupation, education, and gender, which means education and outreach are crucial. A big challenge is the rise in hybridisation with sympatric Phayre’s langurs, driven by habitat degradation—this poses long-term genetic risks (Ahmed et al., 2024).

Take Action!

Capped langurs are vanishing before our eyes, driven to the brink by out-of-control palm oil expansion, deforestation, and development. You can help save them.

Refuse to buy products made with palm oil. Support indigenous-led conservation in northeast India and the Eastern Himalayas. Demand governments halt the destruction of old-growth forests and restore wildlife corridors. Spread awareness and challenge the illegal wildlife trade. #BoycottPalmOil #Boycott4Wildlife #Vegan #BoycottMeat

Support the Capped Langur by going vegan and boycotting palm oil in the supermarket, it’s the #Boycott4Wildlife

Support the conservation of this species

This animal has no protections in place. Read about other forgotten species here. Create art to support this forgotten animal or raise awareness about them by sharing this post and using the #Boycottpalmoil #Boycott4Wildlife hashtags on social media. Also you can boycott palm oil in the supermarket.

Further Information

Ahmed, T., Hasan, S., Nath, S., Biswas, S., et al. (2024). Mixed-Species Groups and Genetically Confirmed Hybridization Between Sympatric Phayre’s Langur (Trachypithecus phayrei) and Capped Langur (T. pileatus) in Northeast Bangladesh. International Journal of Primatology, 46(1), 210–228. doi.org/10.1007/s10764-024-004…

Das, J., Chetry, D., Choudhury, A.U., & Bleisch, W. (2020). Trachypithecus pileatus (errata version published in 2021). The IUCN Red List of Threatened Species 2020: e.T22041A196580469. dx.doi.org/10.2305/IUCN.UK.202…

Hasan, M.A.U., & Neha, S.A. (2018). Group size, composition and conservation challenges of capped langur (Trachypithecus pileatus) in Satchari National Park, Bangladesh. Retrieved from researchgate.net/publication/3…

Wikipedia. (n.d.). Capped langur. Retrieved April 6, 2025, from en.wikipedia.org/wiki/Capped_l…

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