英语听力：探索发现 2013-02-24 猛玛象进城记 Mammoths to Manhattan—12

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This burrowing¹ owl² lives in one of the biggest high-tech³ urban sprawls⁴ of North America. It maintains a tenacious⁵ foothold in Silicon⁶ Valley. Burrowing owls⁷ originally lived on open prairies, but they've been forced to adapt to city life because the urban environment has grown around them. They survive by occupying any tiny sliver⁸ of grassland⁹ that remains¹⁰. Like many city animals, they take advantage of the darkness to protect them and move around mostly at night. These adaptable¹¹ birds traditionally nest in the burrows¹² of prairie dogs. But in the city, a piece of old pipe will do. The parents split their duties. The father does much of the hunting. But in this case, it's the mother that actually feeds the chicks. The burrowing owl's ability to hover¹³ gives it time to judge an attack before pouncing¹⁴ on its prey¹⁵.

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