The mud is a feeding ground for large numbers of birds.

泥地是大量鸟类找寻食物的地区。

《柯林斯英汉双解大词典》

Mixed flocks of several species often travel together, but when they are feeding or resting you will spot different birds on the ground, at mid-level heights and at the tree tops.

很多种鸟常常混群共同迁徙，但是当他们停下来觅食休息的时候，你就会发现不同的种类有的在地面上，有的在中层高度，有的则在树顶处。

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Feeding in trees this way also keeps them safe from ground-based predators, such as foxes.

在树上栖息的方式可以保护它们免受狐狸之类的地面捕食者的伤害。

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First, social media is a rich feeding ground for malware attacks.

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Multiple raw meat sources is a bacterial feeding ground.

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The open savannahs of the Mkata floodplain, at the heart of the park, are reminiscent of the famous Serengeti plains and a popular feeding ground for herd animals such as elephants, giraffe, zebra and wildebeest.

BBC: Tanzania��s alternative to the Serengeti