A study in the Proceedings of the Royal Society B finds that pigeon wing-flapping produces distinct whistles, which can warn flock-mates, when merely taking off or when actively escaping predators.

发表在《英国皇家学会学报b》杂志上的一项研究发现，鸽子震动翅膀的时候能产生特别的呼啸声，这可以用于警告它的同伴什么时候仅仅是起飞或者什么时候逃离它们的敌人。

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Nonsense, say the pigeon-owners, who point out that a hawk or falcon attacking a flock of 50 pigeons may get only one of them, but that the rest will be so frightened that they lose their bearings.

ECONOMIST: Feathered enemies