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Warning signs in a poisonous Papuan songbird

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Bright colors and conspicuous markings are often used in nature to warn off would-be predators. While we are used to seeing such markings—termed aposematic signals—in plants, caterpillars and snakes, we do not usually think of colorful bird plumage as conveying the same message. However, members of the New Guinea songbird genus Pitohui use their plumage to warn predators that they are toxic.

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