Given that predators can make it costly to beg for food, what benefit do begging nestlings derive from their communications?

既然捕食者可以让雏鸟为食物付出巨大代价，那么乞食的雏鸟们到底可以从这种交流方式中得到什么益处呢？

youdao

He knocked at the door of a rich man to beg for food.

他敲上了一个富人家的门，想跟他讨点儿东西吃。

youdao

When he was too old to work, he had to beg for food to stay alive.

当他老得不能干活的时候，只好乞食度日。

youdao

and literally beg you for whatever they want like, if it's money, something to drink, food.

求你给他们一些东西，钱、喝的、食物，什么都可以。

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