| 21. | Firstly, palm oil plantations have removed large areas of the siamang's habitat in the last four decades.
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| 22. | :File : siamang _ compared _ to _ bigfoot . jpg What about this image that has no copyright?
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| 23. | In the 1980s, the Indonesian population of the siamang in the wild was estimated to be 360, 000 individuals.
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| 24. | The siamang prefers calling in the living, high, and big trees, possibly where another group is easy to see.
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| 25. | The singing Siamang gibbons, Orana s first species of ape, were added in 2004 and three youngsters have been raised.
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| 26. | Habitat is peat swamp forests . " D . siamang " is found in Sumatra, Peninsular Malaysia and Borneo.
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| 27. | There are currently four different species of gibbon living here including siamangs, white-cheeked gibbons, pileated gibbons, and agile gibbons
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| 28. | Habitat disturbance affects siamang group composition; it is varied in age-sex structure between intact forest and burnt, regrown forest.
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| 29. | Siamangs are also territorial and interact with other family groups by making loud calls to let other groups know where their territory is.
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| 30. | There is an array of great apes in the siamang gibbons, chimpanzees and Bornean orangutans that swing and hoot around their exhibits.
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