Research by Kent and the University of St Andrews has found that rainforest chimpanzees are digging wells for cleaner water and that the behaviour is spreading.<\/p>\n
The research published by\u00a0Primates<\/em>\u00a0was led by\u00a0Hella P\u00e9ter<\/a>\u00a0(a Biological Anthropology PhD student at Kent\u2019s\u00a0School of Anthropology and Conservation<\/a>) alongside Dr Catherine Hobaiter and Professor Klaus Zuberb\u00fchler (both St Andrews\u2019 School of Psychology and Neuroscience).<\/p>\n Digging small wells to access or filter drinking water is a relatively rare behaviour in the animal kingdom \u2013 only a handful of species have been documented to do so, and most of those live in very arid or desert regions. This is the first time the well-digging behaviour has been observed in rainforest chimpanzees, and it is believed to have been introduced to the community by an immigrant female chimpanzee.<\/p>\n Researchers analysed the behaviour of rainforest chimpanzees in the Waibira community of East African Chimpanzees in Uganda to establish their findings. The well-digging was first observed in Onyofi, a young immigrant female who arrived in 2015 and was immediately very proficient, suggesting she perhaps grew up in a well-digging community. Since then several other young Waibira chimpanzees and adult females have been seen digging wells. No adult males were observed digging, however, they regularly use the wells dug by others.<\/p>\n Onyofi\u2019s well-digging attracted a lot of attention from the other chimpanzees in the group, and she was carefully watched both by young chimps and other adults, suggesting that when she arrived the behaviour was novel to the Waibira community.\u00a0Her wells seem popular, with other chimpanzees drinking from them directly, or using chewed up leaves or moss, demonstrating that there seems to be some added benefit to well-water.<\/p>\n The presence of the behaviour also highlights the importance of water as a resource, even for rainforest living populations. With increasing change in the climate, behavioural adaptations to changes in rainfall may allow groups like Waibira to continue to thrive even when their local habitat starts to change.<\/p>\n \u2019Well digging is usually done to access water in very dry habitats’ Hella told us ‘ \u2013 in chimpanzees, we only know about three savannah living groups who do so.’<\/p>\n \u2019What we\u2019ve seen in Waibira is a bit different from those groups. First, they live in a rainforest, so most people assume getting water shouldn\u2019t be a challenge \u2013 but it looks like the yearly few months of dry season is enough to cause some trouble for them! What\u2019s also interesting is that the wells all appear next to open water, so the purpose of them is likely filtering, not reaching the water \u2013 the chimpanzees might get cleaner or differently flavoured water from a well, which is fascinating.\u2019<\/p>\n Dr Hobaiter added: \u2019One of the most interesting things was seeing the other chimpanzees\u2019 responses to Onyofi\u2019s digging \u2013 even large dominant males would politely wait for her to finish digging and drinking, and only then go and borrow her well, which is pretty unusual around such a valuable resource.<\/p>\n \u2019We\u2019re curious to see what happens once some of the young males who can dig grow older \u2013 maybe they will be acceptable teachers for the big males, and they\u2019ll stop relying on others to dig wells for them.\u2019<\/p>\n Their research paper titled \u2019Well-digging in a community of forest-living wild East African chimpanzees\u2019 is published by\u00a0Primates<\/em>. doi:\u00a010.1007\/s10329-022-00992-4<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"