Many ornithologists specialize in very rare or endangered bird species rather than focusing on more common birds.

相对于关注常见鸟类，很多鸟类学家更是稀有和濒危鸟种的专家。

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A pitta, an internationally endangered bird, found on a mountain on Goje island, South Gyeongsang province, South Korea.

在韩国南庆尚省Goje岛的一座山上，人们终于一睹八色鸟这一国际濒危鸟类的芳容。

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From the plebeian pigeon to the rarest bird of all. The Spix's macaw, or the little blue macaw, may be the most endangered bird in the world.

从最普通的家鸽到最罕见的鸟类中，斯皮克斯金刚鹦鹉，又叫做小蓝金刚鹦鹉，绝对是世界上最为濒危的鸟类。

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More than one third of all threatened or endangered bird species in America live on the Hawaiian Islands.

VOA: special.2009.05.12

Thousands of trees will be planted on a Cumbrian fell in a scheme to boost numbers of an endangered bird.

BBC: Trees planted to boost Cumbria black grouse

The agency posts signs near protected areas that explain the endangered bird in hopes that people will be less likely to ignore the fencing.

WSJ: Wrecked Beaches Could Aid Plovers

But Dr Richard Griffiths and Bela Tiwari of Oxford University have devised a technique to sex the endangered bird from minute samples of DNA taken from moulted feathers.

BBC: Brazil hunts for unique lost bird