There's a reason why flamingos are so pretty in pink: The birds apply "makeup" to impress mates, a new study says. Scientists had long assumed that flamingo feathers change color only when the plumage ...

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The radiant plumage of flamingos wouldn’t be possible without their special diets. Neither would the color of salmon, or koi. The right food can even dye humans – especially babies. At a zoo I visited ...