How did hunting and oil palm cultivation threaten the Bornean orangutan?

The Bornean orangutan (Pongo pygmaeus) is classified as critically endangered, with its population declining by more than 50 percent since the early 1970s due to two primary, interconnected threats: hunting and habitat loss driven by oil palm cultivation.123

Hunting

Hunting has been a significant driver of the species' decline. Between 1971 and 2011, it is estimated that hunters killed between 2,000 and 3,000 Bornean orangutans annually. This direct pressure, often linked to the illegal animal trade and poaching, has severely impacted population numbers.234

Oil Palm Cultivation

The expansion of oil palm plantations in Indonesia and Malaysia has become a major obstacle to the survival of the orangutan. This process threatens the species in several ways:23
* Habitat Destruction: Large swaths of tropical rainforest are cleared to make way for plantations, depriving orangutans of their essential living space and food resources.253
* Fragmentation: The conversion of forests into plantations fragments the landscape, isolating populations and making it difficult for orangutans to move, forage, and reproduce.54
* Slash-and-Burn Practices: New plantations are frequently established using slash-and-burn methods, which destroy remaining forest patches and contribute to poor air quality.54

Ecologists emphasize that these human-driven activities, when combined, significantly increase the risk of extinction for the Bornean orangutan.24