Orangutan Progress in Kehje Sewen!

Independent Leke

Grup Leke 2014.05.26_11 IMG-20140526-WA0007 Leke_Arif

We recently received information on how Leke is progressing and were interested to hear whether she was still spending time with Agus. Well apparently she is not. This week, Leke was seen exploring the forest by herself. In the morning she generally woke up at around 7 am and immediately started to look for food. She has been eating many kinds of foods such as rattanand liana shoots, fruit, cambium, termites and so on.  Despite being seen alone most of the time, the Monitoring Team once observed her and Agus copulate before they went their own ways again. Noel was also observed attempting to engage Leke in copulation and after several attempts, he finally succeeded.

2014.05.29_4 IMG-20140529-WA0007 Leke_Noel_Bani

Leke and Noel.

Leke holds a respected place amongst the orangutans in Kehje Sewen. When Casey and Yayang tried to aggravate her, Leke stood her ground and the duo retreated. Maybe that was the reason why Leke no longer joined Yayang and Sayang during fruit feeding sessions.

Leke seems to be getting to know Kehje Sewen more each day. She is skillful in foraging for food and building nests.

Mother and Daughter Yayang-Sayang

Meanwhile, how are Yayang and Sayang?  Based on our observations, they both look healthy and have adapted well to Kehje Sewen. Usually when Yayang wakes up in the morning, she doesn’t leave her nest right away. Patiently she waits for Sayang to wake up so they can forage together. Yayang often helps Sayang in looking for and selecting foods. She has also been seen helping her daughter bridge gaps between the trees so Sayang can move freely. Yayang always gives Sayang a chance to walk ahead with her following closely behind. Based on our observations, Yayang and Sayang are consuming several forest foods such as termites, lianas, rattan shoots, Baccaurea sp., figs etc.

2014.05.29_5 IMG-20140529-WA0017 YS_Handoko

The lovely mother-daughter.

Sayang still sleeps and shares a nest with her mother. Sometimes if she wakes up earlier than her mother, she will nurse for a while before playing by herself in the trees. If she sees the Monitoring Team, she will generally throw branches at them.

2014.05.28_1 IMG-20140528-WA0018 Yayang_Arif


Sayang seems to be becoming more and more independent. Several times, the team recorded Sayang looking for her own food, even though Yayang was always watching. Despite this budding independence, Yayang will still carry Sayang around while looking for food. Sayang having just turned 5 years old in April, is still being guided by her mother and learning the refined skills she needs to become independent.

2014.05.27_19 IMG-20140527-WA0069 Sayang_Agus

The 5 yo Sayang.

Agus and Friends

Agus seems to have no shortage of friends. He and Leke were seen mating and then made their nests in a same tree. The next day, Leke moved away from Agus and Agus also moved on and continued  feeding alone. As a matter of fact, he ate a lot. He tried many kinds of fruit, shoots and young leaves and travelled continuously through the trees.

2014.06.08_16 IMG-20140608-WA0008 Agus_Agus


At one point Casey approached Agus who for some reason stayed away from her. Casey, who looked healthy, then continued her own journey.

2014.06.03_3 IMG-20140603-WA0007 Casey_Agus


In addition to Agus and Casey, the Monitoring Team also observed Upi. Upi was found feeding on liana fruits and shoots of different species.

In the Gunung Belah area where Upi was located, the Team recorded signals from Acong and Mayang’s transmitters, but couldn’t pinpoint them. Oneng and Nila’s signals were also recorded. The Team will continue to monitor these orangutans and obtain direct observations so we can review their health and progress.

2014.06.04_14 IMG-20140604-WA0017 Upi_Arif


Siwi who was observed in the Kali Tengah area also looked healthy.  She was found at around 11 in the morning whilst feeding. These orangutans are doing well in their new home Kehje Sewen.  We’ll watch and report on their progress and hope they will continue to explore even further!

2014.06.07_11 IMG-20140607-WA0007 Siwie_Lung


Text by: Bani, PRM Technician.


Quick Updates!

Agus and Leke, Love is Blossoming.

Since being released into the Kehje Sewen forest in October 2013, Agus has adapted really well to his new environment. He has been recorded ranging through the forest while trying many new kinds of wild foods available. Based on data collected by the Post-release Monitoring Team, Agus has tried Ficus, Macaranga, Algae, various lianas, mangos and termites.



In the past few days Agus has often been observed approaching Leke. Leke who has usually been actively exploring and trying forest foods was found inactive and lethargic. Agus seems to have boosted her spirit once again.



When the Monitoring Team was on their way to observe Leke, they found her together with Agus. Leke didn’t seem to object to Agus’s company and they were observed foraging for food together.

Agus and Leke.

Agus and Leke.


The next day, the two orangutans were once again together. When Casey arrived, Agus approached Casey, but not for long and he soon returned to the company of Leke. At 14.44, Agus was seen moving away from Leke. She didn’t seem to mind though and continued feeding before finally making her nest in a tall tree.

Agus and Leke.

Agus and Leke.

Oneng and Wani, the Food Lovers.

If there’s a good way to describe Oneng and Wani, it is probably that these two are true food lovers because they are constantly eating.

Wani's fav food, Arthocarpus.

Wani’s fav food, Artocarpus.

The Monitring Team has recorded many kinds of forest food which they have tried, including Ficus, rattan (Calamus) shoots, wild ginger (Etlingera) shoots, Baccaurea fruit, cambium, Artocarpus fruits, and many more.



Oneng and Wani currently spend their time feeding and playing in the trees, followed by more feeding. During one observation the Team recorded Wani foraging for food despite the heavy rain pouring down on her.



Oneng and Wani both look healthy and active. At the end of each day, they generally start collecting the branches and leaves needed to build their nests. Hope you will continue to enjoy your life in Kehje Sewen, Wani and Oneng!

Text by: Bani, PRM Technician.