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Protecting Biodiversity in Pematang Gadung Community Forest

A biodiversity hotspot in Borneo.

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Project Summary

Since 2013, YIARI has been uncovering the rich biodiversity of Pematang Gadung Community Forest – home to orangutans, proboscis monkeys, clouded leopards, and hornbills. Through census surveys, camera trapping, phenology studies, and more recently bioacoustic technology, YIARI are building a detailed picture of what this forest holds and how it's changing.

The Pematang Gadung Village Forest is one of only a small number of areas to receive biodiversity accreditation (PV Nature). Once certified, projects can generate biodiversity credits, enabling responsible organisations to invest in credible, long-term conservation impact.
Local Partner: YIARI

Key Facts

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    species identified

    Scientific research in the forest, including bio-acoustic monitoring has identified 98 unique species, a 4.9% increase year-on-year (2025 data).

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    endangered species

    This rich forest is home to endangered mammals and birds including; orangutans, proboscis monkeys, clouded leopards, and hornbills.

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    rare bird species identified

    The forest is rich in biodiversity with over 141 rare bird species identified and protected.

The Full Story

A Forest Full of Life

Since 2013, YIARI has identified a remarkable range of wildlife within Pematang Gadung Community Forest, including orangutans, proboscis monkeys, clouded leopards, and hornbills. Starting in 2014, census surveys, camera trapping, and phenology studies deepened that picture, recording 53 families and 93 genera of flora, alongside 141 bird species, 60 mammal species, 40 reptile species, and 11 amphibian species.

Listening to the Forest

Since 2024, YIARI has added bioacoustic technology to their monitoring toolkit, gathering data from 12 points across the forest. The results show 98 total identified species, a 4.9% increase compared to the previous year, including 13 new mammal species and 7 new reptile species picked up for the first time.

The Future: Biodiversity Credits

Over the coming years, baseline biodiversity data will be collected through patrols, camera traps and species surveys, helping to demonstrate the richness and ecological importance of this landscape. This data will support Plan Vivo in assessing the biodiversity value of the area and the long-term impact of the conservation work being carried out to protect it. Long-term this will deliver an income for the village communities around the forest. 

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Group of YIARI staff performing some wildlife monitoring

Safeguarding Indonesia's Precious Biodiversity

This unique project aims to protect Borneo's biodiversity by collecting baseline data through patrols, camera traps and species surveys. Once set up this will help demonstrate the forest's ecological value, allowing for biodiversity credits to be sold with all proceeds delivering a direct and lasting income for local communities.
Help Conserve Precious Biodiversity

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