As Indonesia’s forest fires spread, a third of world’s wild orangutans are under threat

Raging Indonesian forest fires have advanced into dense forest on Borneo and now threaten one third of the world’s remaining wild orangutans, say conservationists.

Alarmingly, 358 fire “hotspots” have been detected inside the Sabangau Forest in Borneo which has the world’s largest population of nearly 7,000 wild orangutans. Elsewhere, fires are raging in the Tanjung Puting national park, home to 6,000 wild apes, the Katingan forest with 3,000 and the Mawas reserve where there are an estimated 3,500.

“I dread to think what it will mean for orangutans. For them and other species, like the secretive clouded leopard and the iconic hornbill, the situation is dire and deteriorating by the day,” said Mark Harrison, director of the UK-based research and conservation organisation Orangutan tropical peatland project (OuTrop), which has been studying the tropical peat swamp forest of Sabangau since 1999.

“In their undisturbed, flooded state, peatland forests are naturally fire-resistant. But decades of poor peatland management practices, including extensive forest clearance and canal construction, has drained the peat, putting the whole region at high fire risk when the inevitable droughts occur,” Harrison said.

Professor Susan Page, a geographer at the University of Leicester and an expert on peatland conservation, said: “Dry peat ignites very easily and can burn for days or weeks, even smouldering underground and re-emerging away from the initial source. This makes them incredibly difficult to extinguish. Smouldering fires produce high levels of harmful gases and particulates.”