Chimpanzee (Pan troglodytes) and tufted capuchin monkey (Sapajus apella) infants can take several years to master nut cracking, a skill learned while observing their mothers.
Sources
- Organized to learn: the influence of social structure on ... - Cell Press (cell.com)
- https://www.pnas.org/doi/10.1073/pnas.1518355113 (pnas.org)
- https://royalsocietypublishing.org/doi/10.1098/rsos.161504 (royalsocietypublishing.org)
- https://www.sciencedirect.com/science/article/abs/pii/S0003347294710178 (sciencedirect.com)
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