Traditionally, the drongo perches above a crowd of foraging pied babblers and swoops in from time to time to steal its catch.

通常，卷尾燕栖息在斑点鹃种群的巢穴上部，一次又一次地俯冲下来偷取食物。

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We think that drongos have evolved to alert babblers to their presence because helping the group forage more effectively leads to more frequent opportunities for theft.

我们认为卷尾燕已经进化到警示斑点鹃自己的存在。通过帮助斑点鹃种群更有效率地捕食来寻找更多偷取食物的机会。

youdao

We think that drongos have evolved to alert babblers to their presence because helping the group forage more effectively leads to more frequent opportunities for theft.

我们认为卷尾燕已经进化到警示斑点鹃自己的存在。通过帮助斑点鹃种群更有效率地捕食来寻找更多偷取食物的机会。

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