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
Not all orangutan behaviours are the same. One significant difference lies between wild and rehabilitated orangutans. Although they belong to the same species, their different life experiences play a significant role in shaping their unique behaviour.... View Article
Jenny, Momo, Nia, Esa and Indri were all rescued this year after enduring traumatic experiences. They are now safe in the care of BOS Foundation’s rehabilitation teams. While their stories are heartbreaking, they are also filled... 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
The Post-Release Monitoring team in the Bukit Batikap Protection Forest recently observed Inung and her offspring, Indie, who frequently visit their camp. However, this time, Inung had a special surprise for them. Inung and Indie were... 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
We have recently welcomed a new infant orangutan at the Samboja Lestari Rehabilitation Centre. Little Jenny’s rescue story began when a villager found her alone on an oil palm plantation. Believing she was a macaque, he... 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
We are thrilled to announce that on 10 November 2024, our beloved Meryl finally embraced her freedom in the wild after being released into Bukit Baka Bukit Raya National Park. The spirited female began her new... 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
While season 3 of Orangutan Jungle School is finally airing, we are thrilled to have added this season’s star to our adoption program. Please welcome Bumi. The seven-year-old arrived at our Nyaru Menteng centre on 18... View Article
Our dedicated team of excellent veterinarians is essential in our efforts to save orangutans from extinction. They are available 24/7, from when an orphaned or displaced orangutan arrives at one of our centres until they are... 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
Another beloved orangutan from our adoption program is ready to enjoy true freedom in the Bornean rainforest. We are incredibly proud of Meryl and so thankful to her adopters who supported her during her nine-year rehabilitation... View Article
Have you ever wondered how our forest schools resemble orangutans’ natural habitats? Let’s peek in and see! Sri Rahayu, BOS Foundation’s Surrogate Mother Coordinator at our Nyaru Menteng centre, and her fellow babysitters prepare for another... View Article
We have not one but two beautiful opportunities for you to support our cause this festive season and spread some cheer for our amazing red cousins. While we are celebrating each successful release, we must not... View Article
If you’ve ever watched the documentary series ‘Orangutan Island’, you know her – the coolest female star ever to hit the TV screen: ‘Sheriff Daisy’. It’s been a while since we’ve seen her, but our Post-Release... View Article
In June, we released ten more orangutans into the Bornean rainforest. One of them was eight-year-old Kejora. Her life is a story of both unbelievable cruelty and hope. Despite her tremendous challenges, Kejora’s release proves that... View Article
Baimah arrived at the Samboja Lestari Orangutan Rehabilitation Centre in September 2022. At 15 kilograms, she was severely overweight for a two-year-old orangutan. Find out how she has improved. Before her rescue, a local villager had... View Article
International Orangutan Day is observed annually on 19 August, and we are thrilled to mark this important event again in 2023. This particular day reminds us just how precious this primate species is and why we... View Article
After Sayang was seen some months ago with an enlarged belly and other signs of pregnancy, our Post-Release Monitoring (PRM) team from Camp Lesik could not locate her again – until recently. Meanwhile, Lesan and her... View Article
About five months ago, Lesan, one of the first orangutans released in the Kehje Sewen forest in 2012, gave birth to her second wild-born baby. How are they both doing? The Post Release Monitoring team at... View Article
Recently, a five-member Post-Release Monitoring (PRM) team – consisting of Faldo, Balan, Dandi, Yunus and Welem – set off early into the forest for a day of patrolling. As our team members approached a main transect... View Article
In recent months, Sayang has not appeared around Camp Lesik in the Kehje Sewen Forest. Unlike before, when our team often saw the families of Sayang and Lesan spending time together around the camp, they only... 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 Lesan 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
