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並前往https://www.rfi.fr/en/africa/20210307-rotten-eggs-teach-crows-not-to-rob-nests-in-south-africa-science-wildlife-birds-africa-environment

'Rotten eggs' teach cocky crows not to rob nests in South Africa

Scientists in South Africa have managed to persuade pied crows that it's a bad idea to rob eggs from other birds' nests -- by tricking them ...

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