| 11. | Sumatran orangutans use sticks to acquire seeds from a particular fruit.
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| 12. | Adjacent to the orangutans are a pair of white handed gibbons.
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| 13. | "Plasmodium " species have been isolated from orangutans.
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| 14. | He smokes marijuana and makes friends with an orangutan in New Guinea.
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| 15. | So I followed with a chimp, a lion, an orangutan.
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| 16. | The Sumatran and Bornean orangutans are not always easy to tell apart.
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| 17. | Now she's sharing a bill with an orangutan.
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| 18. | Orangutans are learning to present various parts of their anatomy for examination.
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| 19. | We were both leaning over the rail in front of the orangutans.
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| 20. | You will encourage them to keep orangutans . "'
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