JAKARTA — Climate change has become a direct threat to the survival of the world’s rarest great ape, according to scientists, after landslides triggered by an unusually intense storm killed an estimated 58 critically endangered Tapanuli orangutans (Pongo tapanuliensis) in Indonesia’s Batang Toru ecosystem. The estimate comes from a new study published in Current Biology, whose authors say the findings may represent one of the first examples of climate change immediately threatening the survival of an entire species. The researchers found that landslides triggered by extreme rainfall associated with Cyclone Senyar in November 2025 likely killed about 7% of the estimated global population of Tapanuli orangutans, which number fewer than 800 individuals and are concentrated in the Batang Toru landscape in North Sumatra. After analyzing satellite imagery, the researchers identified more than 50,000 individual landslide scars and estimated that about 8,300 hectares (20,500 acres) of forest in the western block of Batang Toru were affected by the disaster. The western block is considered the species’ most important stronghold, hosting more than 500 orangutans and one of the three known population clusters within the Batang Toru landscape. The researchers believe most orangutans caught in the landslides died rather than being displaced because of the violence and speed of the event. While the landslides were relatively shallow, they moved extremely rapidly and transformed into channelized debris flows. With little or no warning, orangutans and other wildlife likely had little chance of escaping and may have been buried, drowned or fatally injured by…This article was originally published on Mongabay

JAKARTA — Indonesia’s oldest and largest environmental group, Walhi, has formally intervened in an environmental lawsuit filed by the government against a major logging company, arguing the government’s case fails to account for the full extent of ecological damage allegedly caused by the company’s operations. Walhi filed the intervention on May 20, 2026, in the Medan District Court, where the environment ministry is seeking 3.89 trillion rupiah ($214 million) in damages and environmental restoration measures against pulpwood plantation operator PT Toba Pulp Lestari (TPL). The environmental group is not arguing that the ministry’s damages claim is too small. Instead, it says the lawsuit overlooks key ecological impacts, such as critical orangutan and tiger habitats, that should also be addressed through court-ordered restoration. In January 2026, the environment ministry filed lawsuits against six companies over alleged damage to watersheds in North Sumatra province, which the government says contributed to the floods and landslides that struck the region in late November 2025 following cyclone-driven storms across Sumatra. The government also announced the revocation of the permits for TPL and 27 other companies in January 2026. TPL later disclosed to investors that it had received a forestry ministry decree dated Jan. 26 formally revoking its forest-use license, and that it had subsequently ceased forest-use activities within its concession. The floods and landslides struck three provinces on the island of Sumatra, including North Sumatra, and claimed the lives of more than 1,200 people. In its lawsuit against TPL, the environment ministry identified 1,261.5 hectares…This article was originally published on Mongabay