Our Post-Release Monitoring (PRM) team recently translocated Hanung, who the BOS Foundation released to the Kehje Sewen Forest in 2016. Find out why. In addition to releasing and monitoring orangutans in the forest, the PRM... View Article
Orangutans are semi-solitary primates who spend the majority of their lives alone. However, in some orangutan populations, the females will gather in groups from time to time, especially during the fruiting season, when forest food is... View Article
Our Post-Release Monitoring (PRM) team recently searched for orangutans at Puncak Leke in the Kehje Sewen Forest when they caught sight of an unidentified animal. They looked closely at the curious creature and noticed it was... View Article
One of the skills the Post-Release Monitoring (PRM) team members learn when working in the Kehje Sewen Forest is the ability to fire a tranquiliser gun and become jungle sharpshooters. All of them must possess this... View Article
On 6 December 2022, the Balikpapan BKSDA received a report from an employee of PT. Balikpapan Wana Lestari (BWL) that an orangutan had visited the workers’ camp and interacted with staff over four consecutive days. According... View Article
One morning, a Post-Release Monitoring team made up of members Pel, Emen and Jeje, along with our veterinarian, Dr Made, went on patrol along Transect #9. Suddenly, they spotted a male orangutan. Who was it? Well... View Article
On 3 November 2022, a resident of Tumbang Kajamei village in Central Kalimantan travelled for four hours by motorcycle to hand over baby orangutan, Iqo to the BOS Foundation team. When the little female arrived at... View Article
We at BOS have played a part in changing the lives of thousands of orangutans in Indonesia. Our job is not one we have taken on eagerly, but together with the government of Indonesia, we must... 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
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
The BOS Foundation is on a mission to release as many ready orangutans as possible from its two rehabilitation centres into the wild, where they can breed naturally in the forest. However, while in a rehabilitation... 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
Adele is a female sun bear who was first discovered by employees of PT. Inhutani in Long Nah, East Kutai Regency. At the time of her rescue, she was only about a month old, with her... 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
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
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
The BOS Foundation’s Samboja Lestari Orangutan Rehabilitation Centre recently took in another baby orangutan from the BKSDA Regional Conservation Division (SKW) II of Tenggarong. The BOS team – consisting of a veterinarian, surrogate mother, and communications... View Article
Working far away from urban areas has its unique challenges, as our Post-Release Monitoring (PRM) team from Camp Lesik in the Kehje Sewen Forest, East Kalimantan, can attest. Something the technicians regularly experience is running out... View Article
It was another happy day at Nyaru Menteng’s Orangutan Forest School, with the Group 4 students located near the wooden bridge used to access the area on foot. In the space beneath the bridge, where thick... View Article
Thanks to your incredibly generous support, we are now breaking ground on a crucial rehabilitation project for a degraded peat swamp forest in Central Kalimantan, Borneo. The area was once part of a failed mega-rice cultivation... 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
Recently, our monitoring team conducted nest-to-nest observations on Desi, a female orangutan residing on Juq Kehje Sewen, one of BOS Foundation’s pre-release islands in East Kalimantan. The team, consisting of Aluna, Ubay, Rustam, and Erik, had been... 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
On a scorching day at Nyaru Menteng’s Forest School in Central Kalimantan, some students from Group 4 discovered the ultimate way to cool down creating mud bath time. Monte was the first to find a refreshing... View Article
Orangutans have distinctive personalities and unique physical characteristics. These make it easy for those who work with them to tell individuals apart. A few indicators our technicians use to identify orangutans are body size, facial features,... 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
The Ficus racemosa or, as it is commonly known, the cluster fig tree can be found growing throughout the Kehje Sewen Forest in East Kalimantan, where we release rehabilitated orangutans. It grows in lowland, tropical forests, mostly along... 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
Please meet one of our orangutan warriors from the Mawas Conservation Program in Central Kalimantan. His name is Rahmadi, and he has worked for the BOS Foundation for an impressive 17 years. Rahmadi hails from the... View Article
Davi is nearly seven years old and a student at Samboja Lestari’s Forest School, where she continues to learn the skills required to survive in the wild. Davi practices daily how to find food, build nests... View Article
Earlier this year, our Post-Release Monitoring (PRM) team from Camp Lesik in the Kehje Sewen Forest, East Kalimantan, was observing orangutans when male Hamzah suddenly appeared out of nowhere. Find out what happened next. The PRM... View Article
Enrichment is essential in keeping the orangutans in our care mentally engaged while learning vital skills. Dr Nadine Adrianna Sugianto, Post-Doctoral Research Fellow at the University of Birmingham, is working on the Orangutan Enclosure Design Tool... View Article