Archives: January 2016

Mona is Back!

January 26, 2016. Posted in Article

Just recently, Mona reappeared near Camp Lesik, in the Kehje Sewen Forest after a couple of months of us not recording her presence. Our last encounter with Mona was along a transect in the Lembu region, in July 2015 (Read the full story here: A Reunion with Mona and Juminten).

On the morning that Mona reappeared, the sun was just rising and Bowo together with some of the other PRM team were getting ready for their day in the forest. Bowo was the first to spot her sitting on top of a kedondong (ambarella or hog plum) tree, observing her surroundings.

Mona by awal (2)

At first Bowo didn’t recognize her so he tried to identify her using the radio tracking equipment. No signal was detected, so the team then looked through all of the photos of our reintroduced orangutans and found that it was Mona, who we released back in 2013. Its not too surprising that we couldn’t detect her signal as the predicted battery life of the transmitter is between 2-3 years and it has likely now expired.

Mona by awal

Not to let this good opportunity go to waste, we observed and recorded data on her movements and activities every 2 minutes.

We are delighted that Mona looks physically fit and healthy and spent a good deal of time eating the hog plums.

Mona by awal (3)

After feeding for an hour, Mona took herself off deep into Kehje Sewen Forest, moving from tree to tree in an expert fashion.

We were extremely happy to see Mona in such great condition. There is nothing that gives us more pleasure than to witness one of our reintroduced orangutans doing so well and thriving in Kehje Sewen Forest. This is the life they deserve and we are excited to be able to release more orangutans this year!

Text by: PRM team in Camp Lesik, Kehje Sewen Forest

In celebration of the BOS Foundation’s 25th anniversary this year, we hope that the orangutans will continue to live safely in their new natural habitat. We will do our best to continuously monitor their progress and look forward to some new exciting reports on their adaptation this year! You can keep support our team and our monitoring activities. DONATE NOW to BOS Foundation and make a difference to the future survival of orangutans!

Free and Happy: Four Orangutans in Kehje Sewen

January 19, 2016. Posted in Article

It has been a great start to 2016, and our PRM team continues to patrol and observe the orangutans we have reintroduced in the areas surrounding Camp Nles Mamse and Camp Lesik. Our most recently reintroduced orangutans; Hanung, Bungan, Joni, and Teresa were released in the southern part of Kehje Sewen forest last December, and we are delighted to report that they have embraced their new lives and are all doing very well. (Read full story of their release here: Going Home for Christmas).


Hanung has been adapting well to his new environment. He focuses most of his activities in the trees and he has begun to roam and forage extensively. He recently met up with Bungan, Ajeng and Leonie. Ajeng and Leonie only paused for a moment, but then continued on with their journey, leaving Bungan behind who went over to where Hanung was eating fruit and spent some time with him feeding in the trees.


Hanung (Right) dan Bungan (Left)


Similar to Hanung, Bungan is adapting well in Kehje Sewen Forest. Bungan is a friendly and easy to get along with orangutan. Her encounter with Hanung sparked a little relationship and the two have spent time together ever since. Interestingly and unusually, the two now share nest almost every night.



Joni is a big fan of Ficus sp. He also has a huge range and we have recorded his movements to and within the furthest monitoring location. We have yet to see him settle or spend time with other orangutans, but this may come with time. Plus as a male he is more likely to range long distance, so we are very pleased with his progress.



Teresa has been observed consuming plenty of forest fruits, even the ones she has clearly never tasted before. She seems to enjoy exploring the hilly forest areas and moves relatively quickly from one tree to another (mainly to avoid our monitoring team). She is a difficult orangutan to follow, but this is a great sign and one we are happy to see her adopt.


We are so delighted to see these orangutans clearly enjoying their freedom; foraging, making nests, eating wild foods and socializing without fear of conflict with humans. We’ll keep you updated with their progress!

In celebration of the BOS Foundation’s 25th anniversary this year, we hope that the orangutans will continue to live safely in their new natural habitat. We will do our best to continuously monitor their progress and look forward to some new exciting reports on their adaptation this year!


Text by: PRM team in Camp Nles Mamse, Kehje Sewen Forest

You can keep support our team and our monitoring activities. DONATE NOW to BOS Foundation and make a difference to the future survival of orangutans!

Best RHOI Post-Release Monitoring Staff of 2015

January 12, 2016. Posted in Article

Monitoring the released orangutans is one of the most important programs in Kehje Sewen Forest. The Post-Release Monitoring (PRM) team is responsible for observing our reintroduced orangutans everyday from before sunrise each morning until after the sun sets in order to carefully follow the development and adaptation of the orangutans after their release. They need to make sure they are thriving and surviving well in their new forest home, which can be a difficult journey for some of our orangutans.

We have a fantastic team in Kehje Sewen and from the entire PRM team, Luy and Jafar have been voted as the best technicians by their colleagues during 2015!

Here are their brief profiles!

Luy Yan

Luy was born on November 15th, 1991, and is Dayak Wehean. He is the third of seven children. He feels true empathy towards orangutans having seen firsthand their habitat destroyed by oil palm plantations. When he was still an elementary student, Luy witnessed how confused an orangutan became when it lost its natural habitat, which led to the orangutan wandering into the Benhes Village, the village where Luy and his family live.


When RHOI was socializing its programs within the community at Benhes Village in 2011, Luy already began to show his interest in RHOI activities. He had asked many questions about RHOI and day by day, he became more certain that he wanted to leave his job as a farmer on his parents farm. In October 2014 he finally joined RHOI as a member of the Kehje Sewen Forest PRM team in East Kalimantan.

Starting work for us at Camp Lesik, Luy fell in love with his job. For him, being able to observe orangutans in their natural habitat was a gift from God and a priceless experience, and also cured his own trauma of witnessing a confused orangutan in the middle of a human settlement with nowhere to turn. Now, he loves nothing more but seeing orangutans living their lives happily, foraging for food freely, and sleeping in the forest under the safety of his watchful eye.

According to his colleagues, Luy is friendly, handy and reliable and excellent at leading the patrols in the forest. Luy hopes that BOS Foundation and RHOI are able to realize their mission of conserving orangutans and their habitat and socializing nearby communities on the importance of saving orangutans and their habitat.


Jafar born on April 24th , 1994 is a natural adventurer which led to his decision to leave his hometown, Palopo, South Sulawesi, after graduating from high school. With the blessing of his parents, Jafar flew to Borneo to experience new things and find a job.


In Borneo, Jafar lived with a relative in Muara Wahau, the last regency before Kehje Sewen Forest. At that time, he tried his luck as a porter and helped our team during a preliminary survey to the southern part of Kehje Sewen Forest in February 2015. Through this task he had the chance to witness how exciting it is to be a member of RHOI’s PRM team and he decided that this is the world that he wanted to be part of, where he could learn a wealth of knowledge on the flora and fauna living in the forest.

In April 2015, Jafar, the fifth of nine children, officially became a member of PRM team. During his three month training, he was very quick to understand the instructions given by his team. He is a very warm, humble and helpful person greatly respected by his colleagues.

Jafar loves seeing orangutans and other wild animals living in freedom in the wild and he hopes that BOS Foundation and RHOI can keep rehabilitating and reintroducing orangutans to their true habitat. He believes that every good deed done for the sake of nature, people should always support that action. Now Jafar is more motivated than ever to keep his spirits high and struggle to achieve success in observing orangutans in their natural habitat.

We are proud of our whole team and especially proud of Luy and Jafar! As a token of appreciation, we will be presenting a small gift to these two technicians, who are now preparing for the 7th Samboja Lestari Orangutan Release. Great job team!

Gifts given directly by Aldrianto Priadjati as the Deputy Director of RHOI

Text by Ariyo Sambodo, Head of RHOI Operational Bureau

You can support our team and its monitoring activities too. Donate now to the BOS Foundation and keep our spirits high!