The fruit-picking behavior itself, however, is not likely somethingthe birds learn, Bonter said.

摘水果的这种行为，鸟类很难学习到的 。

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As for how the birds do it, it would appear to be something that hasevolved jointly between the berry plants and the birds, said Bonter.

Bonter说，至于鸟类这么做的原因，可能是鸟类和浆果植物之间的共同进化。

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