| Stage 4 - Exhibit Controlled Release |
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 Here, contact between the young orang utans and humans is cut off completely. They are released to roam free within the designated forested areas of the island, which is equipped with all the necessary enrichment material they need to develop physically, socially and emotionally. It is in this stage that the juvenile orang utans exhibit instinctive behavioural traits such as nest building.
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