英语听力：自然百科 野性俄罗斯之西伯利亚 Siberia—3

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Further north, another cold weather survivor² truly clings to life, one of the rarest birds in the world, the critically endangered Siberian White Crane. About 3,500 remain worldwide and only four birds in western Siberia, breeding pairs are precious. After spending the worst of winter in China, they travel almost 5,000 kilometers to breed in the isolated³ wilderness⁴ of the Russian tundra⁵. With so few birds, their monogamy works against them making breeding partners tough to find. But when they connect, both parents raise their young. The female lays two eggs, though generally only one chick will live. As their winter sites shrink, so does their chance for survival.

 

Elsewhere secretive animals lurk⁶ in forested shadows. With a face like a kangaroo and a vampire's teeth, the musk⁷ deer makes its timid way through the woods in search of lichens⁸. Don't be fooled by the fangs⁹: males grow them for display instead of antlers. The older the deer, the longer the fangs. But it's the other end of the deer that attracts more attention, the male's musk gland¹⁰ produces a scent¹¹ that's irresistible¹² to does and perfume makers¹³.

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