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
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
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 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
Jumbo is about to experience his well-deserved freedom in the Bukit Baka Bukit Raya National Park as part of the upcoming release from the Nyaru Menteng Rehabilitation Centre. Before that happens, let’s take a moment to... View Article
Our Post-Release Monitoring (PRM) team in the southern section of the Kehje Sewen Forest recently had another encounter with Signe and her baby. The infant now has a name: Rafalang, which is a combination of the... View Article
Our Post-Release Monitoring (PRM) team recently spotted a familiar face in the Bukit Batikap Protection Forest. After being untracked for several years since her release in 2015, the female orangutan Mentos was finally identified again. Even... View Article
Do you remember the story of Hamzah crashing Lesan and Sayang’s party? It’s been two years since orangutan Sayang and her baby, along with Lesan and her offspring, last celebrated at Camp Lesik. Recently, they returned... View Article
We have a beautiful story about a mother and her infant from one of our release locations in Bukit Baka Bukit Raya National Park. Our Post-Release Monitoring team in the Hiran watershed successfully observed Hilda, a... View Article
The Post-Release-Monitoring Team was thrilled to have finally sighted female Signe and her baby again. Discover how they are doing. It took over a year before Signe finally reappeared near the Camp Nles Mamse area in... View Article
Du, a repatriated female from Thailand, is a beacon of hope for our orangutan conservation efforts. She not only raised three of her own children but also adopted a baby boy from her best friend. Prepare... View Article
When many orangutans come down with flu at the same time, our surrogate mothers and veterinarians work together to make a traditional tonic – onion juice mixed with honey. According to our vet, onions can help... View Article
Samboja Lestari’s Forest School has one less student for the time being, as little Galaksi has been removed from the group’s activities due to a fracture in his leg. Find out what happened to him. Galaksi... View Article
The Kehje Sewen Forest has welcomed a new resident! Following confirmation from our veterinarian in October last year that Lešná was pregnant, we are thrilled to announce that she has since given birth! Lesan was last... View Article
This year, our Nyaru Menteng Orangutan Rehabilitation Centre has taken in several traumatised, orphaned orangutans, including young female Temon. Together with the Central Kalimantan BKSDA, the BOS team helped rescue Temon on June 8, after receiving... View Article
The BOS Foundation recently received three orphaned baby orangutans – two males and a female – all in the same month. After passing the compulsory quarantine period, the trio joined Forest School with other youngsters their... View Article
6-year-old Ayu was born in the wild to the rehabilitated orangutans Lesan and Hamzah (presumed), who were both released in the Kehje Sewen Forest a decade ago. Young orangutans at Ayu’s age will slowly begin to... View Article
All living things, including orangutans, have the drive to meet their biological needs: water, oxygen, food, shelter – and the opportunity to reproduce. When it comes to wild orangutans, who live a semi-solitary life, the reproduction... View Article
An overcast sky provided the perfect atmosphere for a relaxing afternoon at Camp Nles Mamse. While resting in a swaying hammock, I read a book and enjoyed the cool air as it gently breezed through the... View Article
Our Post Release Monitoring team spotted Long again! The female orangutan left a deep impression on the BOS staff, as her relationship with Arief is one of the most extraordinary we have ever observed. It all... View Article
We have an exciting update about mother orangutan Sayang and her daughter Padma. Our Post-Release Monitoring (PRM) team from Camp Lesik observed them in the Kehje Sewen Forest in East Kalimantan. When our PRM team from... View Article