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A silvery gibbon (Hylobates moloch) is seen after being released in West Java, Indonesia, Oct. 5, 2017. The number of silvery gibbon continues to decrease due to forest destruction and poaching activities. (Xinhua/Banyu Biru)

A silvery gibbon (Hylobates moloch) is seen after being released in West Java, Indonesia, Oct. 5, 2017. The number of silvery gibbon continues to decrease due to forest destruction and poaching activities. (Xinhua/Banyu Biru)