The Ministry of Forestry of the Republic of Indonesia, the Natural Resources Conservation Agency (BKSDA) of East Kalimantan, and the Borneo Orangutan Survival (BOS) Foundation are preparing for the 28th orangutan release from the Samboja Lestari... View Article
Observing released orangutans is crucial to Post-Release Monitoring (PRM). It allows the team to directly monitor the orangutan’s physical health, daily activities, foraging skills, and nest-building abilities. Recently, the team from Himba Pambelum Monitoring Camp in... View Article
Not all orangutans face life in the same way. Some individuals are more dominant and bold in taking up space, while others take a different approach to meet their needs without getting into conflict. Jelapat is... View Article
A release into the wild is often seen as the final chapter in an orangutan’s rehabilitation journey; however, for our Post Release Monitoring (PRM) teams, it is not. Discover what it takes to track a released... View Article
The Ministry of Forestry of the Republic of Indonesia, the Central Kalimantan Natural Resources Conservation Agency (BKSDA), the Bukit Baka Bukit Raya National Park (BTNBBBR), and the Borneo Orangutan Survival (BOS) Foundation will soon conduct the... View Article
The Post-Release Monitoring (PRM) team once again recorded interesting observations of orangutans living freely in the Bukit Batikap Protected Forest of Central Kalimantan. This time, the monitoring focused on a mother orangutan named Manggo and her... View Article
In partnership with the Sebangau National Park, BOS is launching its new Sebangau Program. The goal is to safeguard vital peat-swamp forests, which are home to more than 6,000 wild orangutans. Peatland ecosystems are among the... View Article
At the Sun Bear Sanctuary in Samboja Lestari, every bear has its own story. To date, the Borneo Orangutan Survival (BOS) Foundation, through Samboja Lestari, cares for around 75 sun bears, each with a unique life... View Article
Every April 22, millions of people around the world take a moment to recognise a simple yet profound truth: the Earth is our shared home. Since its inception in 1970, Earth Day has grown into a... View Article
On September 13, 2015, a two-year-old female orangutan began a long journey back home to Indonesia. The young orangutan was later named Moza. After being rescued in Kuwait, she was repatriated to Indonesia through a collaboration... View Article
The BOS Foundation is aware that discussions about Pony occasionally reappear in the media and on online platforms. Our communication approach focuses on verified, current information regarding her welfare and care. Pony currently lives at the... View Article
Just like humans, orangutans go through different life stages: from infancy and childhood to adolescence and adulthood. Each stage is characterised by unique traits and behavioural changes. Adolescence is one of the most captivating phases, as... View Article
Do you remember the story of Sally and her little furry friend? That simple story actually offers a broader insight into our understanding of orangutan social behaviour. Although orangutans are often described as semi-solitary primates, they... View Article
World Wildlife Day 2026 carries the theme ‘Medicinal and Aromatic Plants: Conserving Health, Heritage, and Livelihoods’. It highlights the vital role of these plants in supporting human health, preserving traditional knowledge, and sustaining the livelihoods of... View Article
Restoration initiatives are crucial for preparing the Kehje Sewen Forest as a future release area for rehabilitated orangutans from our Samboja Lestari Rehabilitation Centre in East Kalimantan. By maintaining the habitat and ensuring an ample supply... View Article
Rescued in mid-2025, Momo is currently continuing her rehabilitation journey at the Nursery Group, where young orangutans learn essential life skills in a safe and supportive environment. Alongside her peers, she is gradually developing her own... View Article
After a successful collaboration on the sustainable use of sugar palm trees, the Community Development Division at Samboja Lestari has launched a similar initiative to utilise rubber trees. This program is part of the BOS Foundation’s... View Article
The BOS Foundation recently relocated two orangutans from the Individual Enclosure Complex to Sanctuary Island #5 at the Samboja Lestari Orangutan Rehabilitation Centre–a significant step towards a more natural environment. The move is part of the... View Article
Sally, a female orangutan who previously lived in the Socialisation Complex at Samboja Lestari, has taken a huge step on her rehabilitation journey: the BOS team relocated her to the Juq Kehje Swen Pre-Release Island in... View Article
Our efforts to monitor orangutans in the wild have once again delivered heartening news. BOS Foundation’s Post-Release Monitoring (PRM) Team recently encountered a female orangutan strongly believed to be Agis. The rehabilitated female, released into Bukit... View Article
Do you remember Esa and Indri, the two rescued baby orangutans who arrived together at Samboja Lestari in mid-2025? Both have now completed their quarantine period and joined the Nursery Group stage of Forest School. How... View Article
The Nyaru Menteng Orangutan Rehabilitation Centre has recently welcomed a new arrival—a tiny female orangutan named Pororo. Arrival at Nyaru Menteng A local resident who voluntarily handed over Pororo reported that she was found on a... View Article
The Ministry of Forestry of the Republic of Indonesia, the Central Kalimantan Natural Resources Conservation Agency, the Bukit Baka Bukit Raya National Park, and the Borneo Orangutan Survival (BOS) Foundation will soon conduct the 46th orangutan... View Article
Do you remember Kopral, the orangutan with no arms? He is our superhero when it comes to determination, resilience and a positive attitude. Last year, he seriously injured his right foot, which is extremely tragic for... View Article
At the BOS Foundation’s rehabilitation centres, the veterinarians perform routine annual health checks to ensure the well-being of the orangutans in our care. Recently, our medical, animal welfare and technician teams at Samboja Lestari conducted a... View Article
Josie is one of the female orangutans currently honing her learned skills on Kaja Pre-Release Island. She is typically shy and solitary, rarely interacting or socialising with other orangutans on the island. Discover how she has... View Article
Since 29 May 2025, Selfie, a young female orangutan, has officially joined the small group at the Forest School of the Nyaru Menteng Rehabilitation Centre. Initially, she was accompanied by her little friend Rumba, who brought... View Article
Do you remember Sie-Sie, the orangutan who was released into the wild last April? Unlike most orangutans who immediately climb trees or quietly distance themselves after release, Sie-Sie reacted with aggression. He showed signs of stress... View Article
When surrogate mother Eva recently got injured by a branch, she received unexpected emotional support. It was a usual day at the Nyaru Menteng Forest School, where young orangutans learn from one another while their human... View Article
Mating behaviour is one of the most important forms of social interaction in the life of orangutans. This interaction occurs between male and female individuals and plays a vital role in ensuring the survival of a... View Article
In the wild, baby orangutans, like Signe’s son Rafalang, remain closely attached to their mothers until they are around 7 to 8 years old. During this long period, a female orangutan will not give birth again,... View Article
In the vast wilderness of Bukit Baka Bukit Raya National Park, Central Kalimantan, the story of Suci, a young female orangutan, continues to unfold with new wonders. First released in 2021, Suci occasionally appeared during observations... View Article
Wildlife monitoring technology has evolved significantly in recent years, with camera traps being one example. Since 2024, the PT. Restorasi Habitat Orangutan Indonesia (PT. RHOI) team has installed six Reconyx Hyperfire infrared cameras in the Kehje... View Article
In the heart of the Hiran Watershed area within the Bukit Baka Bukit Raya National Park in Central Kalimantan, an unexpected encounter between a mother orangutan and her baby filled the BOS Post-Release Monitoring team with... View Article
As part of ongoing efforts to protect the Kehje Sewen Forest in East Kalimantan, the Community Development Team and the Ecosystem Restoration – Forest Protection, Security, and Fire Prevention (RE-PPHK) Team from BOS Foundation’s company PT... View Article
Nestled in East Kalimantan, the Kehje Sewen Forest is a tropical treasure trove—rich in both biotic and abiotic resources that make it a globally significant ecosystem. Home to a wide variety of plant and animal species,... View Article