Some of nature's most vibrant colors occur in frogs, who peek out from rainforests and marshes in startling shades of blue, yellow and red. But for hundreds of species, only males flaunt flashy colors -- and sometimes only for a few hours, days or weeks each year. Scientists report that the males of at least 178 species of frogs undergo a temporary color change during their breeding season. Their research will help them understand why.
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