Some birds which were once a common sight are now becoming rare.

有些曾经随处可见的鸟类现在日益稀少。

《牛津词典》

And some birds do not build nests at all.

并且有些鸟根本不筑巢。

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However, some birds thrive in noisy environments.

然而，有些鸟会在嘈杂的环境中茁壮成长。

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Some birds flew ten kilometers during that time.

VOA: special.2010.03.02

The project leader says some of the birds place pieces of wood on heavy machinery like bulldozers.

VOA: special.2009.10.06

Wildlife rescuers in Oregon say some of the birds have been seen around restaurants and cafes.

VOA: special.2010.03.02

Some birds -- including migrant species and long distance dispersers -- are more vulnerable to radiation than others, he said.

CNN: Chernobyl: Environmental dead zone or eco-haven?

He said the grass also benefitted local wildlife by providing seeds for some birds and attracting butterflies in the summer.

BBC: Grass stops sand blowing into Guernsey homes

Some birds and sea mammals affected by the spill are likely to die far offshore and never be detected, scientists say.

WSJ: Gauging Harm to Ecosystem Could Take Years