Pig-tailed Snub-nosed Langur Simias concolor

Pig-tailed Snub-nosed Langur Simias concolor

IUCN Red List Status: Critically Endangered

Location: This rare primate is endemic to the Mentawai Islands off the west coast of Sumatra, Indonesia. They are found on Siberut, Sipora, and North and South Pagai, where they inhabit lowland and hill forests in these isolated and fragile ecosystems.

The Pig-tailed Snub-nosed Langur, also known as the Pig-tailed Langur, is one of the most distinctive and endangered monkeys in the world. These ultra rare and critically endangered small primates are known for their short, upturned noses and unique pig-like tails. Pig-tailed Snub-nosed Langurs are critically endangered due to palm oil and timber deforestation, hunting, and habitat fragmentation in their tiny island homes of Siberut, Sipora, and North and South Pagai, Indonesia. Immediate conservation action is necessary to protect the remaining population and their delicate ecosystem from disappearing forever. Fight for them every time you shop and #BoycottPalmOil #Boycott4Wildlife

Appearance and Behaviour

The Pig-tailed Snub-nosed Langur is a medium-sized primate with a striking appearance. Their dense, greyish-brown fur contrasts with lighter underparts, and their small, upturned nose gives them a unique and endearing look. Their short, thick tail, resembling that of a pig, is another defining feature (IUCN, 2020).

These langurs are diurnal and arboreal, spending most of their time in the forest canopy. They live in social groups of up to 20 individuals, where they engage in complex communication and social bonding. Their dynamic foraging strategies allow them to adapt to the heterogeneous environments of the Mentawai Islands.

This species is listed as Critically Endangered because a population decline of 80-90% over the last 36 years (three generations) is estimated due to heavy hunting pressure and extensive habitat loss (especially on southern islands but quite significant throughout species range). The Pig-tailed Snub-nosed Langur is threatened mainly by heavy hunting and commercial logging (Whittaker 2006, Quinten et al. 2014).

IUCN Red List

Diet

The Pig-tailed Snub-nosed Langur is primarily folivorous, feeding on a variety of leaves, but they also consume fruits, seeds, and flowers when available. This specialised diet ties them closely to their forest environment, making them highly vulnerable to habitat destruction and fragmentation (IUCN, 2020).

Reproduction and Mating

As with many langurs, this species is believed to have a low reproductive rate. Females give birth to a single infant after a long gestation period, and young langurs are raised with the support of the social group. This cooperative behaviour is vital for ensuring the survival of the next generation in their challenging environment.

Geographic Range

The Pig-tailed Snub-nosed Langur is restricted to the Mentawai Islands, including Siberut, Sipora, and North and South Pagai. These islands are home to diverse but fragile ecosystems, where this species relies on primary and secondary forests for survival. Their limited geographic range makes them highly vulnerable to localised threats (IUCN, 2020).

Threats

They are also threatened by the conversion of rainforest into oil palm plantations, as well as forest clearing and product extraction by local people. Sometimes, animals are taken for the pet trade (Whittaker 2006).

IUCN Red LIST

• Palm oil and timber deforestation: The rapid expansion of out-of-control palm oil plantations, logging, and agricultural activities has resulted in the widespread destruction of the Mentawai Islands’ forests.
• Illegal hunting for bushmeat: The langur is heavily hunted for bushmeat, a significant threat in local communities.
• Habitat Fragmentation: Infrastructure development and forest clearing have fragmented their habitats, isolating populations and reducing genetic diversity.

Take Action!

Protecting the Pig-tailed Snub-nosed Langur requires urgent conservation measures to halt deforestation and hunting. By boycotting products containing palm oil, supporting indigenous-led conservation initiatives, and advocating for forest preservation, you can help safeguard this critically endangered primate. #BoycottPalmOil #Boycott4Wildlife #Vegan

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Conservation

Conservation efforts for these critically endangered small primates is underway. Read more about Asian Species Action Partnership (ASAP) in Indonesia.

Further Information

Quinten, M, Setiawan, A., Cheyne, S., Traeholt, C. & Whittaker, D. 2020. Simias concolor. The IUCN Red List of Threatened Species 2020: e.T20229A17953422. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T20229A17953422.en. Downloaded on 31 January 2021.

Zhao, L., et al. (2024). Dynamic foraging strategy adaptation to heterogeneous environments contributes to social aggregation in snub-nosed monkeys. Zoological Research, 45(1), 39–54. https://doi.org/10.24272/j.issn.2095-8137.2023.047

Wikipedia. (n.d.). Pig-tailed Langur. Retrieved from https://en.wikipedia.org/wiki/Pig-tailed_langur

GBIF. (n.d.). Simias concolor. Retrieved from https://www.gbif.org/species/4267130

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