A New Form of Tool Use by Orang-Utans in Sabah, East Malaysia

Rogers, Lesley J.; Kaplan, Gisela

doi:10.1159/000156789

Cited by 10 publications

(8 citation statements)

References 4 publications

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“…Wild orangutans have been reported to use leaves to wipe faeces from their body surface [1] or to use a bunch of leafy branches held together as an 'umbrella' for protection against rain or bees [6]. Leaves are also used as vessels to hold food [7] or to obtain water [8]. But none of these examples involves communication.…”

Section: Discussionmentioning

confidence: 99%

Tool Use to Modify Calls by Wild Orang-Utans

Peters¹

2001

IJFP

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Section: Discussionmentioning

confidence: 99%

Tool Use to Modify Calls by Wild Orang-Utans

Peters¹

2001

IJFP

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“…There have been many observations of tool use by great apes in their natural environment; (for chimpanzees [8][9][10]; for orang-utans [11,12]). On the other hand, there have been few reports on tool use by wild monkeys [13].…”

Section: Discussionmentioning

confidence: 99%

Carrying and Washing of Grass Roots by Free-Ranging Japanese Macaques at Katsuyama

Nakamichi

Kato²,

Kojima³

et al. 1998

IJFP

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The acquisition and transmission of new feeding behaviours in Japanese macaques (Macaca fuscata) such as sweet potato washing [1, 2], wheat washing [2] and caramel eating [3, 4] have been well documented. These behaviours are all related to provisioned food. Here we report carrying and washing of grass roots by Japanese macaques in a free-ranging group. This would appear to be the first report of washing of dirt from natural food, such as grass roots, among macaques. Furthermore, some monkeys in the present study rubbed dirt from roots by rolling them along the surface of a flat rock at the edge of a river. This may be considered a tool-using behaviour.

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“…17 However, until recently only rare instances of tool use and manufacture by wild orangutans had been observed. [137][138][139] The only known natural populations of habitually tool-making and tool-using orangutans exist in the swamps of northwestern Sumatra 18,140 (C. P. van Schaik, unpublished data). Orangutans at Suaq Balimbing have a tool kit and adjust tool features to current needs.…”

Section: Cognitionmentioning

confidence: 99%