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The Pinus Jantho Nature Reserve in northern Sumatra serves as a refuge for orangutans that have been freed from captivity or were rescued from burning forests or palm oil plantations.
The area does not contain a wild orangutan population but its altitude as well as its vegetation are an ideal orangutan habitat. The release site is run by the Swiss organisation PanEco and was opened in January 2011. More than 50 orangutans have been successfully released so far.
After the release it is important to monitor the orangutans to find out whether they are able to survive without human help. Newly released animals are followed continuously for about one year, but the assistants try to get regular if infrequent data on animals already released for some time as well.