Solitary most of the year, each individual strives to protect enough real estate to guarantee steady fishing and a good nest site.

一年的大部分时间里，翠鸟都是单独行动的，它们要保证自己有稳定的捕鱼环境，还要保证自己的巢穴有个好位置。

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Nest size and individual number of colonys of the same ant species are different in different habitats.

同种蚂蚁在不同生境中巢穴和蚁群大小有差异。

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He spent more than 20 days living in his large "bird nest" on a meadow, by which he wanted to make people think about individual existence.

该诗人在一个大型“鸟巢”里面连续“生活”了20多天。他称，他的“鸟巢行为”，是希望能引起人们对自我生存问题的思考。

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Some squirrels were placed in individual nest boxes located in the woodlands for immediate release into the wild, and others were released after spending a short time in large aviaries in the woods getting used to their new surroundings.

BBC: Highland boost to red squirrels

Amounts saved in retirement nest eggs are usually intended to finance an individual's retirement years, or to be left as an inheritance for loved ones.

FORBES: Don't Let Failing Health Crack Your Nest Egg