The moon is a waxing gibbon. (78% monkey)

#moon #gibbon #waxing #monkey

Southern White-cheeked Gibbon Nomascus siki

Southern White-cheeked Gibbon Nomascus siki

Red List Status: Critically Endangered

Location: Central Laos (east of Mekong River), Central Vietnam (Ha Tinh, Quang Binh, Quang Tri Provinces)

In the misty canopies of Southeast Asian forests, where ancient trees reach towards clouded peaks and dawn breaks with haunting melodies, Southern White-cheeked Gibbons swing through their rapidly shrinking world.

Southern White-cheeked #Gibbons stand among Southeast Asia’s most melodic #primates, their haunting territorial songs echoing through evergreen forests at dawn. These remarkable apes face an 80% population decline over three generations as #rubber plantations, agricultural expansion, and #hunting devastate their homeland. #Vietnam has lost 15% of its forest cover in just 15 years and could lose another 45% by 2050, while #Laos faces similar destruction. With fewer than 425 groups remaining in fragmented patches, these singing #apes teeter on #extinction’s edge. #BoycottPalmOil #Boycott4Wildlife

Southern White-cheeked #Gibbons 🐒🐵 sing together in regional dialects 🪇🎶🎷 and live in #Cambodia #Laos #Vietnam. They’re critically #endangered on due to #rubber #palmoil #deforestation and hunting. Help them and #BoycottPalmOil 🌴🚫 @palmoildetect https://palmoildetectives.com/2021/01/29/southern-white-cheeked-gibbon-nomascus-siki/

Appearance and Behaviour

Southern White-cheeked Gibbons display striking sexual dimorphism that transforms with age. Juveniles begin life as light brown infants, turning black after weaning. Adult males remain jet black with distinctive white patches framing their mouths, while females develop rich brown colouring with delicate white facial edging. Their long, powerful arms span up to 1.5 metres, perfectly adapted for their brachiating lifestyle.

These gibbons begin each day with spectacular duet songs that can be heard up to 2 kilometres away. Mated pairs sing together to defend territories and strengthen bonds, their regional accents distinguishing different populations. Southern White-cheeked Gibbons are strictly arboreal, spending their entire lives in the canopy where they move with breathtaking grace and speed.

Diet

Southern White-cheeked Gibbons are primarily frugivorous, spending 33% of their day feeding on diverse forest fruits that ripen throughout the year. They supplement their diet with tender leaves, young shoots, and flowers, occasionally capturing small prey like lizards or Finlayson’s squirrels. These gibbons provide a critical ecosystem service by being seed dispersers, carrying viable seeds in their digestive systems across vast territories before depositing them in new locations through their faeces. Their feeding activities help regenerate forest biodiversity across their 37.9-hectare home ranges.

Reproduction and Mating

Southern White-cheeked Gibbons form monogamous pairs that mate for life, raising their young together in tight family units. Females typically give birth to their first offspring between seven and eight years of age. Because raising young is extremely demanding, both parents share childcare duties, and mothers wait until their current offspring becomes relatively independent before having another infant. Families consist of two parents, a juvenile, and an infant at any given time. Young gibbons leave their parents’ territory once they reach maturity between three and six years of age.

Geographic Range

Southern White-cheeked Gibbons inhabit a restricted range in central Laos east of the Mekong River and central Vietnam’s mountainous provinces. Their historical distribution extended from the Nam Theun and Rao Nay rivers in the north to the Banghiang and Thach Han rivers in the south.

In Vietnam, populations are heavily fragmented and scattered, while in Laos populations of gibbons remain larger. Key populations survive in protected areas including Phong Nha-Ke Bang National Park and Nakai-Nam Theun National Protected Area.

Threats

Timber, rubber and palm oil deforestation

Agricultural expansion converts primary forests into farmland and human settlements, destroying the tall broadleaf evergreen forests Southern White-cheeked Gibbons require for survival. Logging operations target luxury timber species, selectively removing the largest trees that provide crucial fruiting resources and nesting sites.

Rubber cultivation destroys the fruiting trees that sustain gibbon populations while fragmenting territories below viable thresholds for family groups. The conversion process typically involves clear-cutting entire forest sections, eliminating decades of ecological relationships in mere weeks. In Cambodia’s Virachey National Park, large areas have been cleared for rubber production in recent years, particularly along the eastern borders where gibbons once thrived.

Infrastructure development and roads

Infrastructure development opens previously inaccessible areas to human exploitation, bringing roads, settlements, and hunting pressure into formerly secure habitats. The fragmentation creates isolated forest patches too small to support viable gibbon populations, leading to local extinctions across their range. Agricultural conversion eliminates the continuous canopy connections these strictly arboreal primates need for movement and foraging.

Hunting and wildlife trade

Traditional medicine practitioners highly value Southern White-cheeked Gibbons for their body parts. Opportunistic hunting with firearms targets gibbons alongside other wildlife, often killing entire family groups when hunters encounter them.

The illegal pet trade tears infant gibbons from their families, condemning them to lives of isolation and psychological trauma in captivity. Local communities hunt gibbons for bushmeat, viewing them as readily available protein sources. Gun ownership and hunting access have increased significantly with infrastructure development, bringing previously secure populations within reach of hunters. The small group sizes and territorial nature of gibbon families make them particularly vulnerable to hunting pressure.

Take Action!

Use your wallet as a weapon and #BoycottPalmOil #Boycott4Wildlife every time you shop. Adopt a vegan lifestyle protecting both wild and farmed animals from agricultural expansion. Support indigenous-led protection recognising traditional forest guardianship. Refuse products containing rubber from deforested areas and demand supply chain transparency. #BoycottPalmOil #Boycott4Wildlife #Vegan

FAQs

What sounds do Southern White-cheeked Gibbons make?

Southern White-cheeked Gibbons are renowned for their spectacular dawn songs that can be heard up to 2 kilometres away through dense forest. Mated pairs perform elaborate duets combining whoops, hoots, and melodic phrases that last 15-30 minutes each morning. These territorial songs serve to defend their home ranges and strengthen pair bonds between mates. Each population has developed regional accents, with slight variations in song structure distinguishing different gibbon communities across their range. Males typically begin the duet with deep hooting calls, while females add higher-pitched, more complex phrases that create hauntingly beautiful harmonies echoing through the forest canopy.

How high can Southern White-cheeked Gibbons swing?

Southern White-cheeked Gibbons are masterful brachiators, swinging through forest canopies 15-50 metres above the ground using their extremely long arms and powerful shoulder joints. They travel at speeds reaching 55 kilometres per hour through the canopy. Their incredible agility allows them to navigate dense forest canopies with extraordinary precision.

How long do Southern White-cheeked Gibbons live?

Southern White-cheeked Gibbons can live 35-40 years. Young gibbons remain with their parents for 3-6 years, learning essential survival skills including territorial singing, foraging techniques, and canopy navigation.

Are Southern White-cheeked Gibbons dangerous to humans?

These gentle apes are primarily frugivorous and spend their time high in forest canopies, far from human activity. Their territorial behaviour is directed only towards other gibbon groups, not humans, and consists of vocal displays rather than physical aggression.

Do Southern White-cheeked Gibbons make good pets?

It is deeply cruel to keep these wild apes as pets. Southern White-cheeked Gibbons suffer extreme psychological trauma, loneliness, and early death in captivity. The illegal pet trade rips infant gibbons from their families, causing severe trauma while removing potential breeding individuals from critically endangered populations.

Captive Southern White-cheeked Gibbons often develop depression and aggression as they attempt to cope with social isolation and environmental deprivation. Legal ownership is prohibited under CITES Appendix I and national laws in both Vietnam and Laos.

Why do Southern White-cheeked Gibbons sing?

Southern White-cheeked Gibbons sing elaborate duets to defend their territories, strengthen pair bonds, and communicate with neighbouring families across the forest landscape. These dawn songs serve as acoustic boundaries, informing other gibbon groups about occupied territories and preventing potentially dangerous physical confrontations. Mated pairs coordinate their duets to demonstrate their strong partnership and reproductive fitness to potential rivals. The songs also help family members locate each other in dense forest canopies and may serve to teach young gibbons proper vocal techniques essential for establishing their own territories. Regional variations in song structure function like dialects, allowing gibbons to identify members of their local population versus strangers from distant areas.

Further Information

Can, D. N., Trai, L. T., Ninh, L. V., Hieu, T. D., Nghia, H. V., Mai, T. T., & Tu, L. N. (2020). The status of southern white-cheeked gibbon (Nomascus siki) in Truong Son key biodiversity area. Vietnam Journal of Biotechnology, 42(1), 31-42.

Endangered Primate Rescue Centre

Nguyen, M.H., Coudrat, C.N.Z., Roos, C., Rawson, B.M. & Duckworth, J.W. 2020. Nomascus siki. The IUCN Red List of Threatened Species 2020: e.T39896A17968765. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T39896A17968765.en. Downloaded on 28 January 2021.

Southern white-cheeked gibbon (Nomascus siki) in Nakai-Nam Theun National Protected Area, Lao PDR. Conservation and Science Report, Northeast Primate Conservancy.

Southern White-cheeked Gibbon Nomascus siki

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#Agriculture #Ape #apes #Boycott4wildlife #BoycottPalmOil #Cambodia #CriticallyEndangeredSpecies #deforestation #endangered #extinction #frugivore #Gibbon #Gibbons #hunting #illegalPetTrade #infrastructure #Laos #Mammal #palmoil #petTrade #Primate #primates #roads #rubber #SeedDispersers #seeddispersal #song #SouthernWhiteCheekedGibbonNomascusSiki #vegan #Vietnam

Skywalker Hoolock Gibbon Hoolock tianxing

Skywalker Hoolock Gibbon Hoolock tianxing

Location: Eastern Myanmar and southwestern China, particularly the Gaoligong Mountains

IUCN Status: Endangered

High in the treetops of Myanmar and China’s remote montane forests, the Skywalker Hoolock Gibbon swings effortlessly through the canopy, moving with near-weightless grace. These rare, tree-dwelling primates were only officially described in 2017, making them one of the most recently discovered gibbon species. With fewer than 150 individuals confirmed in the wild, they are now among the world’s most endangered gibbons, clinging to existence in increasingly fragmented forests.

Despite their elusive nature, their presence is unmistakable—their piercing songs echo at dawn, carrying for over a kilometre through the jungle. But in many places, these songs have fallen silent, drowned out by the sounds of logging, mining, and hunting. Their delicate grip on survival is under immense pressure from habitat destruction, poaching, and the relentless expansion of agriculture. Help them by campaigning for their survival #Boycott4Wildlife.

https://youtu.be/HRn4fTaJgiU

High in #China 🇨🇳 and #Myanmar’s 🇲🇲 trees live melodic long-limbed bards of the jungle. Skywalker Hoolock #Gibbons 🙉🐵🐒 got their name from #StarWars 🛸🌌 but Skywalker also translates to ‘Heaven’s Movement’ in Chinese. Help them and #Boycott4Wildlife https://palmoildetectives.com/2021/02/06/skywalker-hoolock-gibbon-hoolock-tianxing/

Just a few dozen beautiful and elegant Skywalker #Gibbons 🐵🐒remain alive in the vulnerable forests of #Myanmar 🇲🇲and southern #China 🇨🇳 Threats include cardamom #deforestation 🥜🔥 #poaching and #climatechange. Help them survive #Boycott4Wildlife https://palmoildetectives.com/2021/02/06/skywalker-hoolock-gibbon-hoolock-tianxing/

Appearance and Behaviour

Skywalker Hoolock Gibbons are strikingly beautiful primates, with graceful, elongated limbs and expressive, intelligent eyes. Their fur varies from black to dark brown, with a large beard that can be either black or brown, unlike their closest relatives, the Eastern hoolock gibbon (Hoolock leuconedys), which have white beards. One of their most distinctive features is their white eyebrows, which are thinner and more widely spaced than those of other hoolock gibbons.

Males and females are sexually dimorphic. Males have dark brown fur with a slight brownish overlay, while females are yellowish or reddish-blonde, with incomplete white facial rings. Younger gibbons lack the white fur under their eyes and chin, making them easier to distinguish.

These gibbons are arboreal specialists, spending their entire lives in the trees. They travel through the forest canopy using brachiation, swinging between branches with their long arms at breathtaking speed. On the ground, they are awkward and vulnerable, avoiding descent unless absolutely necessary.

Skywalker hoolock gibbons are highly social and monogamous, forming lifelong pairs. Their strong bonds are reinforced through duet calls—long, melodious songs that mated pairs perform together at dawn. These calls serve as territorial markers and as a way to maintain their connection. However, in some areas, researchers have observed gibbons going silent for weeks after hearing gunfire, an eerie reminder of the threats they face.

Geographic Range

Skywalker Hoolock Gibbons are found in the dense montane forests of eastern Myanmar and southwestern China, particularly in the Gaoligong Mountains. Initially, scientists believed their population was limited to small, fragmented groups in China. However, a groundbreaking study in 2024 confirmed that Myanmar is home to the largest known population of these elusive primates.

Using a combination of acoustic monitoring and DNA analysis, researchers were able to identify 44 previously unknown Skywalker gibbon groups in Myanmar. This discovery significantly expands their known range and offers new hope for their conservation.

Despite this positive news, over 90% of their range remains unprotected, leaving them highly vulnerable to habitat destruction. In Myanmar, their forest home is shrinking due to illegal logging, mining, and agricultural expansion, forcing them into smaller and more isolated populations.

Diet

Skywalker Hoolock Gibbons are primarily frugivorous, meaning that fruit makes up the majority of their diet (around 49%). However, when fruit is scarce, they also consume leaves, buds, flowers, and even small invertebrates or bird chicks. Their diet shifts with the seasons, with ripe fruit being the most sought-after food source.

They play a crucial role in their ecosystem as seed dispersers, ensuring the health and regeneration of the forests they inhabit. Without them, the delicate balance of their habitat would begin to unravel.

Reproduction and Mating

Mating among Skywalker hoolock gibbons is a complex social ritual. Females initiate courtship, presenting themselves to males, who respond by approaching them in an elaborate display of mutual trust. Once bonded, these pairs remain together for life, raising one offspring at a time.

The gestation period lasts around 7 months, after which a single helpless, pink-skinned infant is born. The mother provides constant care and protection, carrying the baby clinging to her fur for the first several months of life. Juveniles remain dependent on their parents for up to 8 years before reaching sexual maturity.

Due to their slow reproductive rate, any decline in population is devastating. If adult gibbons are killed, the loss is felt for generations, pushing their already fragile numbers closer to extinction.

Threats

Skywalker Hoolock Gibbons face a critical battle for survival, with their population declining due to multiple human-driven threats.

In Myanmar, the Skywalker Hoolock Gibbon remains threatened by habitat loss due largely to slash-and-burn agriculture, gold mining and logging, and secondarily by hunting for food and medicinal purposes (Ni et al. 2018). Unfortunately, the species is not known to occur in any protected areas in this country.

IUCN Red List

Habitat Destruction and Deforestation

• Myanmar and China’s forests are rapidly disappearing due to commercial logging, mining, and slash-and-burn agriculture.

• Over 90% of their range remains unprotected, making them highly vulnerable to deforestation.

• In Myanmar, forest loss has accelerated since 2000, with up to 9% of their habitat disappearing in key areas.

As trees fall, gibbons lose their homes, their food sources, and their ability to move safely through the forest canopy.

Agricultural Expansion and Cardamom Plantations

• Large swathes of forest are being cleared for cardamom plantations, particularly in China.

• While some gibbons have adapted to agroforestry environments, heavy fragmentation of these habitats isolates populations, preventing gene flow and increasing the risk of inbreeding.

Hunting and the Illegal Wildlife Trade

• In Myanmar, hoolock gibbons are hunted for food and traditional Chinese medicine, with the false belief that consuming their brains can cure epilepsy.

• They are poached for the illegal pet trade, with babies being torn from their mothers, who are often killed in the process.

• Even when not actively hunted, gibbons are often shot by miners and loggers as they are seen as “noisy disturbances.”

Climate Change and Habitat Fragmentation

• Warming temperatures and unpredictable weather patterns due to climate change are altering the availability of food sources, forcing gibbons into competition with one another.

• Fragmentation of forests forces gibbons to travel across open ground, making them highly vulnerable to predators and human threats.

FAQS

How many Skywalker hoolock gibbons are left?

Fewer than 150 individuals have been confirmed in the wild. However, new research suggests their numbers may be slightly higher in Myanmar, though they remain endangered.

Where do Skywalker hoolock gibbons live?

They are found in eastern Myanmar and southwestern China, particularly in the Gaoligong Mountains and areas between the Salween and Irrawaddy Rivers.

What do Skywalker hoolock gibbons eat?

Their diet is primarily fruit, but they also consume leaves, buds, flowers, insects, and bird chicks when plant sources are limited.

How do Skywalker hoolock gibbons communicate?

They perform loud, melodic duet songs at dawn, which serve to mark territory and strengthen bonds between mated pairs.

Why are they called ‘Skywalker’ hoolock gibbons?

They were named by researchers who are Star Wars fans, inspired by their graceful movement through the treetops and the Chinese translation of their name, which means ‘heaven’s movement’.

Are Skywalker hoolock gibbons endangered?

Yes, they are listed as Endangered on the IUCN Red List. Their population is small and highly fragmented, with habitat loss being the greatest threat to their survival.

Can Skywalker hoolock gibbons be kept as pets?

No. Keeping a gibbon as a pet is illegal, immoral and cruel. Many gibbons in the pet trade are illegally captured from the wild, often involving the killing of their family members.

Take Action

Skywalker Hoolock Gibbons are on the brink of extinction, but you can help ensure their survival. The biggest threats to these rare primates come from deforestation, illegal hunting, and the expansion of agriculture such as cardamom plantations. Protecting them means taking action against habitat destruction and the wildlife trade.

• Boycott palm oil, cardamom, and other crops linked to deforestation. The destruction of their habitat is directly linked to agriculture and logging. Every time you shop, choose products that are 100% palm oil-free to avoid contributing to deforestation and biodiversity loss.

• Support Indigenous-led conservation efforts. More than 90% of their habitat is unprotected. Local indigenous communities play a crucial role in protecting their forests from destruction. Donate to or amplify the work of organisations that empower Indigenous and local communities to safeguard forests.

• Demand stronger wildlife protection laws. Gibbons are hunted for food and traditional medicine, and the illegal pet trade remains a major threat. Contact policymakers and demand harsher penalties for those who exploit endangered species.

• Spread awareness. Many people have never heard of the Skywalker Hoolock Gibbon or the threats they face. Share their story on social media using #BoycottPalmOil #Boycott4Wildlife #Vegan and encourage others to take action.

Without urgent intervention, these rare gibbons could be lost forever. Every action counts—speak up, make ethical choices, and help protect their rainforest home before it’s too late.

Further Information

Cowan, C. (2024). Skywalker gibbons confirmed in Myanmar for the first time. Mongabay. https://news.mongabay.com/2024/02/skywalker-gibbons-confirmed-in-myanmar-for-the-first-time/

Fan, P.F., Turvey, S.T. & Bryant, J.V. 2020. Hoolock tianxing (amended version of 2019 assessment). The IUCN Red List of Threatened Species 2020: e.T118355648A166597159. https://dx.doi.org/10.2305/IUCN.UK.2020-1.RLTS.T118355648A166597159.en. Downloaded on 06 February 2021.

Wikipedia Contributors. (n.d.). Skywalker hoolock gibbon. Wikipedia, The Free Encyclopedia. https://en.wikipedia.org/wiki/Skywalker_hoolock_gibbon

How to easily identify gibbons by Noah RNS Shepherd

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.

Skywalker Hoolock Gibbon Hoolock tianxing

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#Boycott4wildlife #BoycottPalmOil #China #ChineseMedicine #climatechange #deforestation #EasternHoolockGibbonHoolockLeuconedys #EndangeredSpecies #ForgottenAnimals #Gibbon #Gibbons #hunting #illegalPetTrade #Mammal #Mentawi #Myanmar #palmoil #poaching #Primate #SkywalkerHoolockGibbonHoolockTianxing #StarWars #vegan #WesternHoolockGibbonHoolockHoolock