The birds are hard to observe, as they live in a region of mountainous forest, so the researchers have attached tiny cameras to the tails of some birds, as one method of investigating their behaviour.

这些鸟很难观察，因为它们生活在山区森林里，所以研究人员在一些鸟的尾巴上安装了微型摄像机，以此作为一种研究它们行为的方法。

youdao

As the name suggests, you'd be following the river for most of the way, and you get to see some of our beautiful native birds, but the track also goes through a densely forested area.

正如其名，你们的大部分路线是沿着河走的，你们会看到一些我们本地美丽的鸟类，但这条路线也会穿过一片密集林区。

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Some species of Arctic birds are threatened by recent sharp increases in the population of snow geese, which breed in the Arctic and are displacing birds of less vigorous species.

某些种类的北极鸟受到近来雪雁数量急剧增加的威胁，这些雪雁在北极繁殖，并且正在取代生命力较弱的鸟类。

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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

There were even real pigeons perched in some of the windows - though the birds were stuffed.

VOA: standard.2010.02.25

However, some of the birds are being transferred to Mallydams to ease the pressure on West Hatch.

BBC: Dead bird at Portland - Jason Hoad

Some of the birds rescued after being covered in an oil additive have been released back into the wild.

BBC: First birds released after south coast oil rescue

When oil was just starting to smudge some of the birds on beaches now thick with it, I saw sanderlings, ruddy turnstones, black-bellied plovers and other such northbound birds.

CNN: We are all Gulf victims now