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  • Footage from a nature reserve in Senegal documents adult chimpanzees handing tools and food to younger individuals, a behavior researchers classify as teaching.
  • The study indicates that these transfers often come at a cost to the adult, who may stop using the tool, while benefiting the juvenile’s ability to learn feeding techniques.
  • While the findings expand understanding of social learning in primates, questions remain about whether this behavior is unique to specific communities or widespread across the species.

New analysis of wildlife camera footage reveals that wild chimpanzees in Senegal engage in deliberate acts of teaching by passing tools and food to younger members of their group. The research, published recently in Frontiers in Psychology, challenges long-standing debates about how these primates acquire complex skills such as ant fishing and nut cracking. By documenting instances where adults facilitate learning for juveniles, scientists argue that social transmission plays a critical role in the development of tool-use behaviors within chimpanzee communities.

The study relied on nearly fifteen hours of video recorded between 2017 and 2025 at the Dindefelo Community Nature Reserve. Researchers installed cameras at fourteen sites where western chimpanzees were known to use tools, as well as eleven additional locations associated with proto-tool use involving baobab fruit. The footage captured thirty-three distinct instances of tool transfer and four cases of food handover. These observations provide rare visual evidence of direct interaction between generations during skill acquisition.

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In the recorded interactions, most transfers occurred between relatives, with mothers accounting for a significant portion of the exchanges. Adults provided tools in fifty-eight percent of the observed cases, while infants received them in forty-two percent of instances. One notable example involved a mother named Soukki, who inserted a stick into an ant nest and then guided her daughter, Saïsaï, to the tool. The juvenile subsequently removed the stick and consumed the ants, demonstrating immediate application of the technique.

Another sequence highlighted the role of observation in learning. A mother named Féré placed baobab fruits near her infant son, Fotti, on a rocky surface. Although the infant attempted unsuccessfully to crack the fruit, a juvenile male intervened by bashing the fruit against the rock. The infant watched attentively before consuming a piece of the opened fruit. Researchers interpret these scenarios as forms of teaching that combine direct transfer with supervised practice and observation.

A key aspect of these findings is the apparent cost incurred by the adult chimpanzees. In many cases, the individual handing over a tool used it less frequently afterward or ceased using it entirely. This sacrifice aligns with scientific criteria for teaching in animal behavior, which requires that the instructor’s actions benefit the learner while imposing a cost on the teacher. The recipients, conversely, showed increased engagement with the tools and more frequent feeding behaviors following the transfers.

The implications of these observations extend beyond simple skill acquisition. They suggest that chimpanzees possess sophisticated social learning strategies that facilitate the transmission of technological knowledge across generations. This behavior mirrors aspects of human cultural transmission, where experienced individuals actively guide novices through complex tasks. The study underscores the importance of social bonds in maintaining and evolving tool-use traditions within primate groups.

Despite these insights, significant questions remain regarding the scope and universality of this behavior. It is unclear whether the teaching dynamics observed at Dindefelo are unique to this specific community or if they occur in other chimpanzee populations across different habitats. Researchers note that expanding studies to additional locations will be essential for comparing how teaching and facilitation vary among different groups and environments.

Further investigation is needed to determine if more complex skills require higher levels of instructional input from adults. Scientists are also interested in whether individuals who receive more instruction become better teachers themselves, creating a feedback loop that enhances cultural transmission within the group. Understanding these dynamics could provide deeper insights into the evolutionary roots of education and social learning in primates.

The findings contribute to a broader understanding of chimpanzee cognition and social structure. By demonstrating that adults actively facilitate learning at a personal cost, the study highlights the cooperative nature of skill acquisition in wild populations. This perspective shifts the focus from individual discovery to communal knowledge sharing, offering new avenues for exploring how cultural behaviors emerge and persist in non-human species.

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  • Smithsonian Magazine↗Cameras Capture Adult Chimpanzees Passing Tools—and Know-How—to Their Young, Teaching Important Skills to the Next Generation