Barn owl siblings share their food in exchange for grooming

Such cooperation is thought to be rare among the young of other birds

https://www.washingtonpost.com/health/barn-owl-siblings-share-their-food-in-exchange-for-grooming/2020/06/19/a8eb30d2-b0c6-11ea-8758-bfd1d045525a_story.html

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