Jumbo was the fifth orangutan released by the BOS team into the Bukit Baka Bukit Raya National Park in Central Kalimantan. He followed Hanau, Pirang, Rongda, and Radmala, who were released prior. These five orangutans were... 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
The Ministry of Forestry of the Republic of Indonesia, the Central Kalimantan Natural Resources Conservation Agency and the Borneo BOS Foundation will soon conduct the 45th orangutan release from the Nyaru Menteng Rehabilitation Centre to Bukit... View Article
April 23, 2025, marked a historic moment in Indonesia’s orangutan conservation efforts. The Ministry of Forestry of the Republic of Indonesia, the East Kalimantan Natural Resources Conservation Agency (BKSDA), and the Borneo Orangutan Survival (BOS) Foundation,... View Article
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—with support from Riau Andalan Pulp and Paper (RAPP)—are preparing for 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
At the end of last year, sweet Meryl embarked on her new life in Bukit Baka Bukit Raya National Park. Despite experiencing stress during the journey, Meryl quickly adapted to her new environment. Her journey symbolises... 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
Kehje Sewen, one of our release forests, is a tropical rainforest spanning 86,593.65 hectares. Half of the area consists of hilly terrain, creating a distinctive tropical ecosystem supporting Borneo’s endemic wildlife. The wealth of biotic and... View Article
What a surprise! After a long absence, one of the dominant male orangutans, Hamzah, has finally been spotted again near Camp Lesik in the Kehje Sewen Forest. Our Post-Release Monitoring (PRM) team was stunned by Hamzah’s... 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
Runtu, a 23-year-old female, is one of six orangutans we recently released into the Bukit Baka Bukit Raya National Park (TNBBBR). She is a repatriated orangutan from Thailand and has been undergoing challenging rehabilitation at the... View Article
The Ministry of Environment and Forestry of the Republic of Indonesia (KLHK), the Natural Resources Conservation Centre (BKSDA) of Central Kalimantan, and the Borneo Orangutan Survival (BOS) Foundation will soon conduct the 44th orangutan release from... View Article
Earlier this year, the smart Josh and tenacious Telaken finally made their way to a pre-release island, marking a significant milestone in their journey back to the wild. Along with three other orangutans—Uru, Bawan, and Monte—they... View Article
Our Post-Release Monitoring (PRM) team in the Hiran watershed recently observed Gonzales, a male orangutan the BOS Foundation team released in November 2022 in the Bukit Baka Bukit Raya National Park. What was he up to?... View Article
Do you remember Inung and Indie? The Post-Release Monitoring team recently spotted the unexpected visitors of a mother-infant pair near Camp Totat Jalu in the Bukit Batikap Protection Forest, Central Kalimantan. Inung and Indie were observed... View Article
On Saturday, November 12, a small caravan carrying some very special cargo departed from the BOS Foundation’s Nyaru Menteng Orangutan Rehabilitation Centre in Central Kalimantan. The teams started the day as the sun rose with a... View Article
The BOS Foundation has successfully released 500 orangutans in the decade since the releases restarted in February 2012. Our latest release journey began in the evening when swabs were used to collect samples from team members... View Article
While we are preparing for the release of the 500th orangutan, please get to know the lucky ones that will enjoy their well-deserved freedom soon. BEN Ben was born in a clinic at the BOS Foundation’s... View Article
The culmination of an orangutan’s rehabilitation journey is the release of that orangutan into a protected natural habitat. Reintroduction is a long process that encompasses education in Forest School and putting skills into practice on a... 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
Recently, the Post-Release Monitoring (PRM) team had the rare chance to observe an orangutan mother and her two children together. Find out who it was and why this family is so special. At the time, Jimi... View Article
One of the tasks of the Post-Release Monitoring (PRM) team involves collecting data on the phenology of natural-occurring plant species in orangutan habitats. While conducting phenological surveys, the BOS rangers occasionally meet orangutans as well. Let’s... 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
There are certain moments you never forget, moments that hold special meaning and evoke strong emotions. I had such an experience during the 39th orangutan release conducted by the BOS Foundation in Central Kalimantan on May... View Article
It’s happening again! We are thrilled to announce that we are getting ready for our first release this year. We are about to bring four orangutans home into the Bukit Baka Bukit Raya National Park in... View Article
Correctly identifying orangutans during observations can be tricky. This is especially true if our Post-Release Monitoring (PRM) team observes orangutans they haven’t spotted for a long time or when the team on duty is not familiar... View Article
Beni, Orangutan Jungle School superstar and internationally beloved orangutan, faces his greatest challenge – life on a pre-release island. In classic Beni fashion, less than two months into his stay, he has already found himself at... View Article
The most enjoyable experience for our Post-Release Monitoring (PRM) teams is meeting up with orangutans they have not seen for a long time. Last week, we reported about catching up with Mona again. But our PRM... View Article
A collaborative effort between the BOS Foundation, the Central Kalimantan Natural Resources Conservation Agency and the Bukit Baka Bukit Raya National Park Agency closed 2021, seeing eight more orangutans released into the forest after completing their... View Article
It’s always great to catch up with orangutans in the forest whom we haven’t seen for a while. We are delighted to spot them again, as they prove that rehabilitated orangutans can return to the wild... View Article
Friendships always have their ups and downs. Interestingly, this also applies to orangutans. Desi and Kimi, two females, living on Juq Kehje Swen Island in East Kalimantan, are good friends known to have the occasional fight.... View Article
As 2021 draws to a close, it’s time to reflect on what you have helped us achieve in this most challenging year – from rescuing 15 orangutans and releasing 25 into the wild to replanting 200... View Article
We are thrilled to introduce you to the eight orangutans who are about to return to their true home in the Bornean rainforest. This will be the 38th orangutan release from our Nyaru Menteng Orangutan Rescue... View Article
We have great news to share with you! Big Boy Beni has graduated! He now lives on a pre-release island in the Salat Island Cluster in Central Kalimantan, Borneo. Beni moved together with our beloved Meryl,... View Article
It was early in the morning when our Post-Release Monitoring (PRM) team at Camp Lesik, in the Kehje Sewen Forest, East Kalimantan, set out to capture Bong. The female orangutan, whom we released five years ago,... View Article