"I get a lot of cats because they kill them because of the bird population," she explained.

“我有很多猫的尸体，因为人们为了保护鸟类的数量杀了很多猫，”她解释道。

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Avian influenza has caused widespread epidemics in bird population in many parts of the world.

禽流感已逐渐演变成在全球各地禽鸟中散播的疫症。

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In early summer the bird population increases and we look forward to the return of many of our beautiful bird friends.

初夏，鸟的数量增长，我们盼望着许多美丽的鸟类朋友的回归。

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The question therefore arises whether windows are causing the bird population to decline.

BBC: How many birds are killed by windows?

Another challenge is containing the virus's spread within the bird population, researchers say.

WSJ: Hong Kong Steps Up Bird-Flu Measures

Before the experiment got under way, they surveyed the bird population in every patch of woodland each season for two years in other words, eight times in all.

ECONOMIST: Ecology: Under the mistletoe | The