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How do chameleons change their color?

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Unlike other animals that change color, such as the squid and octopus, chameleons do not modify their hues by accumulating or dispersing pigments within their skin cells, the researchers found. Instead, the lizards rely on structural changes that affect how light reflects off their skin, the researchers said. read more

Chameleons are famous for their quick color-changing abilities. It's a common misperception that they do this to camouflage themselves against a background. In fact, chameleons mostly change color to regulate their temperatures or to signal their intentions to other chameleons. read more

Scientists believe that chameleons change color to reflect their moods. By doing so, they send social signals to other chameleons. For example, darker colors tend to mean a chameleon is angry. Lighter colors might be used to attract mates. Some chameleons also change colors to help their bodies adjust to changes in temperature or light. For example, a chameleon that gets cold might change to a darker color to absorb more heat and warm its body. read more

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