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Predators are gathering. It's called the bat volcano because every night it erupts.
捕食者正在聚集，这被称为“蝙蝠火山”，因为它每晚都要喷发。
This is one of the greatest bat colonies on earth. Perhaps as many as 3 million bats live here.
这里是地球上最大的蝙蝠聚居地之一，大概有300万只蝙蝠生活在这里。
To avoid being eaten, they form a living tornado 200 meters tall.
为了避免被吃掉，它们组成了一个200米高的活龙卷风。
In this whirling mass, it's almost impossible for their predators to choose a target.
在这个漩涡中，它们的捕食者几乎无法选择目标。
But the bats must head to their feeding grounds and they start to peel off across the forest.
但蝙蝠必须前往它们的觅食地，它们开始穿越森林。
Now the hunters can strike.
现在，猎人出击了。
One bat narrowly escapes.
一只蝙蝠侥幸逃脱。
Others aren't so lucky.
其他的就没这么幸运了。
Bat falcons and brown jays also swoop in to make their kills.
蝙蝠隼和棕色松鸦也会猛扑过来捕食。
But nothing can dent the swarm.
但没有什么能够削弱蝙蝠群。
They're heading for the corn fields across the forest. There, they will devour 20 tons of insect pests.
他们正穿过森林去玉米地，它们将在那里吃掉20吨的害虫。
