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How does a chameleon change its colour?

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New research shows chameleons actively tune nano-crystals to change their color. For a ... Does the chameleon think "Oh damn, a rival, better move around those crystals! ... Somehow I feel like the information contained in this video will never rid the chameleon of its association with perfect camouflage. read more

Since chameleons can't generate their own body heat, changing the color of their skin is a way to maintain a favorable body temperature. A cold chameleon may become dark to absorb more heat, whereas a hotter chameleon may turn pale to reflect the sun's heat. Chameleons will also use bold color changes to communicate. read more

The chameleons can change the structural arrangement of the upper cell layer by relaxing or exciting the skin, which leads to a change in color, they found. For instance, a male chameleon might be in a relaxed state when it's hanging out on a branch, and in an excited state when it sees a rival male. read more

There is this myth that chameleons change colour to blend in with their surroundings, but this is actually not true. Most of the reason chameleons change colour is as a signal, a visual signal of mood and aggression, territory and mating behaviour. read more

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