Puffin scratches itself with a stick

A puffin on Grimsey Island, Iceland, picks up a wooden stick from the ground and used it to scratch its chest.

Researchers say puffins are most likely engaging in grooming by using the stick to dislodge parasites or to scratch.

Tool use is rare in animals and mostly seen in primates and passerine birds when they perform complex tasks, often related to feeding.

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