This view was supplanted after discovering proof of tool use amongst chimpanzees and other primates, dolphins, and crows. For instance, researchers have noticed wild chimpanzees using primary foraging instruments, pestles, levers, using leaves as sponges, and tree bark or vines as probes to fish termites. West African chimpanzees use stone hammers and anvils for cracking nuts, as do capuchin monkeys of Boa Vista, Brazil. Tool use isn’t the only type of animal technology use; for instance, beaver dams, built with wooden sticks or giant stones, are a technology with “dramatic” impacts on river habitats and ecosystems.
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