Fruit season always brings an abundance of food, and among the various options available, lahung fruit (Durio dulcis) is a favorite among orangutans.

During an observation conducted by the PRM team on July 12, 2026, this tropical rainforest fruit, distinctive for its spiky skin and red-orange flesh, entered its fruiting season, catching the attention of Yuniar, Bong, and her baby.

An interesting moment was recorded when Yuniar actively collected lahung fruits, both fallen ones and those picked directly. She didn't enjoy them alone, because she shared and ate a portion of the lahung fruit with Bong.

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Thanks to the abundant supply of lahung, these two orangutans displayed a high level of social interaction. They moved around and enjoyed the sweet meal together.

Interestingly, when Yuniar grew curious and attempted to approach the PRM team, Bong gently touched Yuniar's face, as if signaling her to remain focused on enjoying the lahung harvest and not approach humans.

Nearly three hours of observation passed before both orangutans eventually moved away and disappeared behind a steep slope. Under the shade of the lahung trees, the remaining red-orange spiky fruits served as tangible proof of how valuable the presence of lahung trees is, not only as a lifeline, but also as a source of joy for orangutans in their natural habitat.

Text by: Biodiversity-PRM Team, PT RHOI, East Kalimantan