Releasing Rehabilitated Orangutans Back Into Borneo's Rainforest

Founded in 1991, the Borneo Orangutan Survival Foundation (Yayasan BOS) runs Indonesia's largest orangutan rescue and rehabilitation network, operating forest schools and release sites across Central and East Kalimantan. Rescued and orphaned orangutans spend years relearning wild skills before release into protected forest at Bukit Batikap, Bukit Baka Bukit Raya National Park, and the Kehje Sewen Forest. The foundation has released more than 900 rehabilitated orangutans back into the wild since 2012, including six in 2024 alone, while continuing to care for almost 400 orangutans that cannot yet be released. BOSF also manages forest habitat spanning more than 1.1 million acres, including the Mawas conservation area, home to an estimated 2,550 wild orangutans.