Monday, February 4, 2008

A Horse of Another Color

New research debunks the idea that chameleon's change color to hide. Excerpt from Science Now:
Everyone knows what makes the chameleon so special: its rapid color-changing camouflage. But the bug-eyed lizard's reputation as a master of disguise is being challenged by new research published today in PLoS Biology. Its flexible pigmentation may actually be a sexy, albeit dangerous, way to stick out.…

Male chameleons are usually a dull shade of brown or green. But thanks to a special lining of skin cells wired directly to their brains, the lizards can quickly flash to a variety of other colors, including bright green, yellow, and even pink. Past research has shown that the lizards use these colors to intimidate other males when fighting or to impress females when flirting. But the belief persists, even among biologists, that the color change also evolved to help chameleons hide from the birds that hunt them.
More here.

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