Nila Kartika Wati
The dense, mist-covered mountain forests of Beutong Ateuh Banggalang in the Nagan Raya Regency of Aceh Province serve as a critical refuge for a diverse array of avian species and apex predators, positioning the region as one of the most ecologically significant corridors within the Leuser Ecosystem. Recent surveys conducted by the Environmental Studies Group of Aceh (KSLH) have identified 31 distinct species of birds inhabiting these highland forests, with a concerning number of these populations facing severe threats of extinction. This rich biological tapestry, which bridges the gap between the Leuser Ecosystem and the Ulu Masen forest, is sustained by a unique local governance system rooted in indigenous traditions that emphasize harmony with nature over industrial exploitation.
The Avian Census: A Snapshot of Fragile Diversity
The findings from the KSLH, released in late August 2026, underscore the urgent conservation needs of the region. Out of the 31 species documented, four are classified as Endangered (EN) by international standards: the Sumatran Mesia (Leiothrix laurinae), the Aceh Bulbul (Pycnonotus snouckaerti), the Sumatran Laughingthrush (Garrulax bicolor), and the Sumatran Leafbird (Chloropsis media). These species, which rely heavily on the integrity of the canopy and the specific microclimates of the Beutong highlands, represent a high-priority concern for ornithologists and conservationists.
Beyond the endangered category, the survey highlighted three species classified as Vulnerable (VU)—Schneider’s Pitta (Hydrornis schneideri), Graceful Pitta (Erythropitta venusta), and Hoogerwerf’s Pheasant (Lophura hoogerwerfi)—and four species listed as Near Threatened (NT), including the Sumatran Green Pigeon (Treron oxyurus) and the Sumatran Woodpecker (Picus dedemi). Additionally, the presence of the Sumatran Robin (Myiomela sumatrana), currently listed as Not Evaluated (NE), suggests that the area may hold further biological secrets yet to be categorized by formal science.
Heri Tarmizi, the Coordinator of KSLH Aceh, emphasized that these birds are not merely colorful inhabitants of the forest but act as vital bio-indicators for the overall health of the ecosystem. "The forest of Beutong is an essential sanctuary for Sumatra’s avian life," Tarmizi noted. "Because each species has specific requirements for nesting, feeding, and breeding, any fragmentation or alteration of the forest cover sends immediate ripples through these populations. The presence of these birds tells us that the ecosystem is still largely functional, but it is a delicate balance that is easily disrupted by external pressures."
Indigenous Stewardship: The Beutong Philosophy
The human element of Beutong Ateuh Banggalang is as significant as its wildlife. Comprising only four villages—Babah Suak, Blang Meurandeh, Blang Puuk, and Kuta Teungoh—the district is home to roughly 2,400 people who have successfully maintained a traditional lifestyle centered on sustainable agriculture and forestry. The community relies on approximately 500 hectares of rice paddies, alongside small-scale plantations and the bounty provided by the Meureubo River, to sustain their livelihoods.
Teungku Malikul Azis, a revered local customary and religious leader known as Abu Kamil, describes the community’s relationship with the land as a sacred duty. "We are the inheritors of this land, and we have been taught for generations that we must live within our means," Abu Kamil stated. "The forest is our fortress; the river is our lifeblood. We do not view the land as a commodity to be mined or destroyed. Our culture forbids greed, and that philosophy has allowed us to survive alongside the most powerful creatures in the wild."
This cultural resistance to industrial encroachment, particularly gold mining, has been a defining feature of the local discourse for years. Residents argue that their prosperity is not measured by the extraction of minerals, but by the stability of their water sources and the health of their natural surroundings. This perspective was reinforced by the devastating floods that impacted the region in late 2025, an event that served as a grim reminder of the potential consequences of environmental degradation in high-altitude, steep-sloped areas.
The Apex Predators: A Corridor for the King of the Jungle
The ecological significance of Beutong Ateuh extends well beyond birds. The area acts as a vital bridge between the Leuser Ecosystem and the Ulu Masen forests, facilitating the movement of wide-ranging mammals. Between July 2021 and July 2023, an intensive survey conducted by the Leuser Conservation Forum (FKL), in collaboration with the provincial government’s Forest Management Units (KPH) and conservation groups like SINTAS Indonesia, provided compelling evidence of this.
Data presented in February 2024 at a workshop on Wild Cat Conservation in the Leuser Ecosystem revealed that the Terangun-Beutong corridor supports a stable population of large felines, including the Sumatran tiger (Panthera tigris sumatrae), the Sunda clouded leopard (Neofelis diardi), and the Asiatic golden cat (Catopuma temminckii). Furthermore, the presence of a robust prey base—including sambar deer, serow, muntjac, and wild boar—confirms that the ecosystem is capable of supporting these apex predators without them needing to encroach on human settlements.
The coexistence between the local population and these predators is unique in the Indonesian context. Despite being surrounded by prime tiger habitat, residents of Beutong report almost zero human-wildlife conflict. According to community leaders, the lack of conflict stems from a combination of respectful distance and the preservation of prey populations. "We do not hunt the prey animals, and in return, the predators do not hunt our livestock or threaten our children," explained Abu Kamil. "There is a silent, ancient contract between the people and the forest. If we happen to cause harm to an animal, we believe it is our responsibility to make amends."
Implications for Regional Conservation Policy
The scientific and anecdotal evidence emerging from Beutong Ateuh presents a clear challenge to regional policy planners. As Aceh continues to navigate the balance between economic development and environmental preservation, the Beutong model provides a blueprint for what is known as "community-led conservation."
The primary threat to this region remains the potential for gold mining and infrastructure development, which could irreversibly fragment the habitat. The loss of connectivity between the Leuser and Ulu Masen forests would likely spell disaster for the tigers, which require massive home ranges to survive, and for the endangered birds, which are highly sensitive to the edges created by logging roads and mining pits.
Furthermore, the recent flood events in the district have heightened awareness of the hydrological services provided by these forests. By maintaining the forest cover, the community is not just protecting wildlife; they are preventing the erosion of their own agricultural land and protecting their water supplies.
Conservationists are calling for the formal recognition and protection of the Beutong Ateuh landscape as a critical biological corridor. With the current survey data, there is now a scientific foundation to push for stricter land-use regulations that prioritize the protection of the endemic and endangered species identified by KSLH.
"If we lose Beutong, we lose more than just a few species of birds," warned Heri Tarmizi. "We lose a vital piece of the puzzle that keeps the Sumatran forest alive. The residents of Beutong have shown that it is possible to live in the modern world while respecting the limits of nature. It is time for policymakers to recognize that this way of life is not a hindrance to progress, but the only sustainable path forward."
As the region moves toward the future, the case of Beutong Ateuh stands as a testament to the resilience of both nature and traditional knowledge. The challenge for the provincial government will be to translate this local success into a broader, state-level mandate that prevents the industrialization of one of Sumatra’s most precious remaining wild frontiers. The survival of the Sumatran tiger and the rare, melodic birds of the highland canopy may ultimately depend on the political will to keep the Beutong forest intact, silent, and protected from the machinery of exploitation.
