Sumatra Landslide Wipes Out 11% of World's Rarest Ape

Climate change-fueled landslides have significantly impacted the Tapanuli orangutan, the world's rarest great ape species, on Indonesia's Sumatra island. A severe weather event last November triggered mudslides, resulting in the deaths of an estimated 58 Tapanuli orangutans, representing about 11 percent of the wild population in the affected region. This single incident has pushed the species, of which fewer than 800 remain, even closer to extinction.

The mudslides, caused by heavy rains during Cyclone Senyar, not only killed the apes but also destroyed crucial food sources and shelter within the Batang Toru Ecosystem. Satellite analysis revealed that approximately 8,300 hectares of forest, over 11 percent of the area, were affected by the landslides. This ecological devastation highlights the vulnerability of the highland habitat where Tapanulis have been displaced due to human development.

Conservationists are calling for the permanent protection of the Batang Toru ecosystem to prevent the first modern extinction of a great ape species. They emphasize the need for international partners to provide immediate biodiversity-recovery financing. This event underscores the broader issue of Sumatra losing vast tracts of forest, increasing the susceptibility of its landscapes to landslides.