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    Access to resources shapes species' physiology and behaviour. Water is not typically considered a limiting resource for rainforest-living chimpanzees; however, several savannah and savannah-woodland communities show behavioural adaptations to limited water. Here, we provide a first report of habitual well-digging in a rainforest-living group of East African chimpanzees (Pan troglodytes schweinfurthii) and suggest that it may have been imported into the community's behavioural repertoire by an immigrant female. We describe the presence and frequency of well-digging and related behaviour, and suggest that its subsequent spread in the group may have involved some degree of social learning. We highlight that subsurface water is a concealed resource, and that the limited spread of well-digging in the group may highlight the cognitive, rather than physical, challenges it presents in a rainforest environment. © 2022. The Author(s).


    Hella Péter, Klaus Zuberbühler, Catherine Hobaiter. Well-digging in a community of forest-living wild East African chimpanzees (Pan troglodytes schweinfurthii). Primates; journal of primatology. 2022 Jul;63(4):355-364

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    PMID: 35662388

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