16/04/14 Sumatran orangutans, Bukit Lawang, Indonesia16/04/14 Sumatran orangutans, Bukit Lawang, Indonesia16/04/14 Sumatran orangutans, Bukit Lawang, Indonesia16/04/14 Sumatran orangutans, Bukit Lawang, Indonesia16/04/14 Sumatran orangutans, Bukit Lawang, Indonesia16/04/14 Sumatran orangutans, Bukit Lawang, Indonesia16/04/14 Sumatran orangutans, Bukit Lawang, Indonesia16/04/14 Sumatran orangutans, Bukit Lawang, Indonesia