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Two tree frogs share an intimate moment. The eye-popping yellow of the male only emerges in mating season. Martin J. Whiting When seeking out potential mates, frogs, like humans, will often alter ...

What explains the vivid colors of the strawberry poison-dart frog? Piotr Naskrecki / Minden Pictures In the animal world as in fashion, bright color makes a bold statement. The vivid hues of the ...