Orangutans in danger as wildfires blaze through Borneo

Wildfire Smoke Chokes Borneo’s Last Orangutan Strongholds

Ninoda.com – A frail orangutan, too weak to climb or forage, was discovered collapsed on the forest floor near Ketapang in West Kalimantan, one of the most remote stretches of Indonesian Borneo. Its condition — dehydrated, malnourished, and unable to reach the canopy where it would normally spend its days — is a grim indicator of what the surrounding landscape has become. The animal was taken to a rehabilitation facility where it will receive medical care before being returned to the wild once its strength allows.

That single rescue is not an isolated incident. It is one visible symptom of a much larger crisis unfolding across the island. Indonesia has escalated its response to contain the thick haze generated by wildfires burning through six provinces spanning both Borneo and Sumatra. The flames have consumed significant tracts of primary and secondary forest, erasing the canopy cover that hundreds of orangutans depend on for food, shelter, and movement. Conservationists warn that the cumulative effect threatens the long-term survival of the species on the island.

A Species Already on the Brink

Bornean orangutans (Pongo pygmaeus) are classified as critically endangered by the IUCN, with wild populations estimated at roughly 100,000 individuals across Indonesian and Malaysian Borneo. They are slow breeders — a female produces a single infant roughly every four to six years — meaning that habitat destruction and direct mortality take decades to reverse. Sumatran orangutans (Pongo abelii), the island’s other great-ape species, face parallel pressures from the same fire fronts now consuming lowland forests in Sumatra’s southern provinces.

Orangutans are almost entirely arboreal. They travel through the upper canopy, nest in trees each night, and feed on fruits, leaves, bark, and insects found high above the ground. When fire strips that canopy, the animals are forced down to the forest floor, where they are exposed to predators, dehydration, and the direct heat of the blaze. An orangutan on the ground, as was the case in Ketapang, is an orangutan in immediate danger.

Voices from the Front Line

Karmele Llano Sanchez, chief executive of Yayasan Inisiasi Alam Rehabilitasi Indonesia (YIARI), the wildlife foundation based in Ketapang that operates one of the region’s key orangutan rehabilitation centres, described the current conditions in stark terms:

“The situation is quite critical.”

She added that the ongoing fires are stripping the forest of its resources:

“[The fires are] leaving [the orangutans] without any food or water.”

YIARI confirmed that the weakened individual found near Ketapang will be housed at its rehabilitation centre, where veterinary staff will treat dehydration, assess nutritional status, and monitor for smoke inhalation or burn injuries. Once the animal has recovered sufficient strength and behavioural competence, it will be released back into a suitable forest corridor.

Why the Fires Keep Coming

Recurring wildfire seasons in Indonesian Borneo and Sumatra are not purely natural events. Much of the affected land consists of drained peat swamp forest, converted over decades for oil-palm plantations, pulpwood estates, and cattle pasture. Once the water table drops below the peat surface, the organic substrate becomes combustible. A single ignition — often from land-clearing burns that escape containment — can smoulder underground for weeks, producing the dense, low-lying haze that blankets entire provinces and drifts across borders into Malaysia and Singapore.

The pattern has repeated since the catastrophic 1997–98 haze episode, which prompted the ASEAN Haze Agreement. Despite decades of policy commitments, enforcement gaps, fragmented land tenure, and the economic pull of commodity agriculture mean that dry-season burning remains the cheapest method of clearing land. El Niño years, which deepen drought and extend the dry window, amplify the risk dramatically.

What Happens Next

Indonesian authorities have deployed additional aerial water-bombing aircraft, ground firefighting teams, and satellite monitoring to track hotspots across the six affected provinces. Provincial governors have issued land-use restrictions and ordered plantation operators to demonstrate fire-readiness before the dry season peaks. Yet the scale of the burning — spanning both islands simultaneously — stretches even expanded resources thin.

For the orangutans caught in the fire’s path, the window for intervention is narrow. Every day the canopy remains scorched, every additional hectare of fruiting tree lost, reduces the carrying capacity of the remaining forest. Rehabilitation centres such as YIARI’s can treat individual animals, but they cannot rebuild the thousands of hectares of mature forest that a single fire season can consume. The Ketapang rescue is a success story in miniature; the species-level question is whether enough habitat will remain for the next generation to find.