Venus flytraps, for example, share an ancestor with Portuguese sundews, which only catch prey passively, via "flypaper" glands on their stems.

例如，维纳斯捕蝇草和葡萄牙茅膏菜有共同的祖先，后者只通过茎上的“捕蝇纸”腺体被动地捕捉猎物。

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It does this not only to hide itself from attack but also to catch prey.

变色既有利于隐藏自己，又有利于捕捉猎物。

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Animals use their claws or talons to catch prey, climb trees, and defend themselves.

动物使用爪子来捕获猎物，攀爬树木和自我防御。

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However, the Senegal site is lacking in this species, so chimps may have needed to adopt a new hunting strategy to catch a different prey - bushbaby.

BBC: Chimps sharpened the spears with their teeth

Polar bears, for example, are becoming endangered, as the disappearance of ice obliges them to swim farther and farther to catch seals, their main prey.

ECONOMIST: A meltdown tinged with acid

In some cases, the British government actually commissioned seamen to commit acts of piracy, but with one catch: They were charged to prey only upon Spaniards, British rivals on the high seas and in the New World, and turn over a large portion of the stolen loot to the government.

NPR: Pirates 101: Fact and Fiction on the High Seas