At the end of March, rescuers arranged to release Mata with another orangutan, a female named Mynah, who was also rescued from the forest fires.
"After a final medical health check, Mata and Mynah were ready to leave Ketapang and embark on their new life," IAR wrote in a statement.
The trip was a long one. After carrying the orangutans from the rescue center, people drove them 52 hours to the village of Mengkilau. Then they all piled into boats - people and orangutans alike - and went upstream to a part of the jungle safe enough for Mata and Mynah to live: Bukit Baka Bukit Raya National Park in West Borneo.