Dusky Langur Trachypithecus obscurus

Dusky langurs—also known as spectacled langurs, dusky leaf monkeys, and spectacled leaf monkeys

Dusky Langur Trachypithecus obscurus


Malaysia; Myanmar; Thailand

Dusky Langurs are beautiful primate threatened by #palmoil #deforestation in #Malaysia #Myanmar and #Thailand. Help them by supporting @LangurPenang and #Boycott4Wildlife the supermarket brands destroying their home

Hunting for food is a major threat, as is fragmentation, habitat loss and degradation due to expanding oil palm plantations, agriculture, urbanization, and touristic development (Groves et al. 2013). In Peninsular Malaysia the langurs are frequent victims of road-kill (Boonratana 2003).

IUCN Red list

Playful, gregarious and social Dusky Langurs prefer closed primary forests, but can also be found in old-growth secondary and disturbed forests, plantations, urban areas, and parks, suggesting a fairly high adaptive capability when compared with most colobine species. It is diurnal, primarily arboreal, and folivorous. They consume a varied diet of fruit, flowers and other items. Individuals are able to take advantage of unripe fruit, which have chemical defenses, by the same means that they break down toxins in plant leaves, using the bacteria found in their digestive system (MacKinnon and MacKinnon 1980).

New-borns of Dusky Langurs have bright orange fur with pink skin. The orange coating begins to shed 2nd week after birth. At around 3rd week old, black-greyish hair starts to appear on the forehead, tail, and limb. By 4th month old, the head and back are black-greyish with only the cheeks showing traces of yellow. After six months, their entire bodies are light black-greyish, which grows darker as they become juveniles. The secondary layer of white-ish fluffy hair will only start growing at 6th month old.

The Dusky Langur is often found in single female-multiple male groups or in multiple male and female groups of around 10-20 individuals.

Help save this beautiful species from extinction

The Dusky Langur Project Panang

Further Information

ICUN endangered logo
Dusky langurs—also known as spectacled langurs, dusky leaf monkeys, and spectacled leaf monkeys

Boonratana, R., Ang, A., Traeholt, C. & Thant, N.M.L. 2020. Trachypithecus obscurus. The IUCN Red List of Threatened Species 2020: e.T22039A17960562. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T22039A17960562.en. Downloaded on 26 June 2021.

How can I help the #Boycott4Wildlife?

Contribute 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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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

Published by Content Catnip

Content Catnip is a quirky internet wunderkammer written by an Intergalactic Space Māori named Content Catnip. Join me as I meander through the quirky and curious aspects of history, indigenous spirituality, the natural world, animals, art, storytelling, books, philosophy, travel, Māori culture and loads more.

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