David Attenborough: Japanese Snow Monkeys Washing Potatoes

Japanese snow monkeys on Koshima learning culture by discovering and sharing the technique of washing sweet potatoes in fresh water to rinse off sand and dirt, and then salt-water, to add flavor. They also discover how to separate sand and rice clumps by throwing the mixture into water and letting the rice float to the surface.

Parts are closed-captioned due to background surf noise.

From the BBC documentary "Life on Earth: Episode 12: Life in the Trees" (1979), narrated by a younger David Attenborough.