Drone footage has captured killer whales breaking off stalks of kelp and rubbing the pieces on other orcas, a rare case of tool use in marine animals
Več na: https://www.newscientist.com/article/2485501-orcas-scrub-each-other-clean-with-bits-of-kelp/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home
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