JELAPAT THE STRATEGIST
Not all orangutans face life in the same way. Some individuals are more dominant and bold in taking up space, while others take a different approach to meet their needs without getting into conflict. Jelapat is... View Article
orangutan behaviour
orangutan behaviour
3 DAYS WITH MANGGO AND MELKI
The Post-Release Monitoring (PRM) team once again recorded interesting observations of orangutans living freely in the Bukit Batikap Protected Forest of Central Kalimantan. This time, the monitoring focused on a mother orangutan named Manggo and her... View Article
VITAL INTERACTIONS
Do you remember the story of Sally and her little furry friend? That simple story actually offers a broader insight into our understanding of orangutan social behaviour. Although orangutans are often described as semi-solitary primates, they... View Article
A UNIQUE FRIENDSHIP
Sally, a female orangutan who previously lived in the Socialisation Complex at Samboja Lestari, has taken a huge step on her rehabilitation journey: the BOS team relocated her to the Juq Kehje Swen Pre-Release Island in... View Article
A CALM ADAPTATION TO THE WILD
Do you remember Sie-Sie, the orangutan who was released into the wild last April? Unlike most orangutans who immediately climb trees or quietly distance themselves after release, Sie-Sie reacted with aggression. He showed signs of stress... View Article
ARE ORANGUTANS EMPATHETIC?
When surrogate mother Eva recently got injured by a branch, she received unexpected emotional support. It was a usual day at the Nyaru Menteng Forest School, where young orangutans learn from one another while their human... View Article
LOVE IS IN THE AIR
Mating behaviour is one of the most important forms of social interaction in the life of orangutans. This interaction occurs between male and female individuals and plays a vital role in ensuring the survival of a... View Article
A Grassy Adventure
Welcome to another thrilling day at the Nyaru Menteng Forest School! Today, we’re hanging out with our favourite cheeky orangutans—Paulinus, Bumi, and their playful pals—for some epic fun with fresh-cut grass! The youngsters stumbled upon a... View Article
TEMON AND LAHEI DISAPPEAR
Temon, a 3-year-old female orangutan, and Lahei, a 4-year-old male, are skilled and independent explorers from the large Forest School group at the Nyaru Menteng Rehabilitation Centre. Recently, they kept our surrogate mothers on their toes... View Article
HOW TO OBSERVE ORANGUTANS
Earlier this year, the BOS Foundation welcomed a wave of new personnel in three divisions: Post-Release Monitoring, Ecosystem Restoration–Forest Management & Development, and Ecosystem Restoration-Protection, Security, and Fire Management. Each division has its distinct roles and... View Article
CAN ORANGUTANS SURVIVE IN AQUATIC ENVIRONMENTS?
Orangutans are arboreal primates. Most of their activities involve navigating the forest canopy by combining climbing, clambering and brachiating. Given that orangutans share 97% of their DNA with humans, it is intriguing to explore how their... View Article
Galaksi is no longer little
Galaksi, once a tiny and fragile orangutan at Samboja Lestari’s Rehabilitation Centre, has blossomed into a lively and spirited youngster. Since he arrived in 2021, Galaksi has been under the careful watch of our dedicated surrogate... View Article
A THRILLING ENCOUNTER
Who remembers Petto? We have missed him since our Post-Release Monitoring (PRM) team from the Himba Pambelum Monitoring Camp in Bukit Baka Bukit Raya National Park Area (TNBBBR), Central Kalimantan, last encountered him in August 2022. ... View Article
HANUNG MOVES HOUSE
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
HOW DO ORANGUTANS ‘TALK’?
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
BUNGARAN STARTS HIS OWN ADVENTURES
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
A DAY WITH DESI
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
MUD-BATH TIME!
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
LOVELY LOCKS, LADIES
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
PEER LESSON: HOW TO OPEN FOOD ENRICHMENT
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
Orangutan Party
Orangutans are fascinating to observe. If you pay attention closely, you will uncover a world of exciting behaviours and interactions. For example, when several individuals come together and form a so-called ‘party’. Our Post-Release Monitoring (PRM)... View Article