Wild Wonders

The Science of Blue Animals


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Examines why blue is rare in nature, noting that appearances of blue in the sky and water result from light scattering and absorption, not pigments. Many blue animals, like the Hyacinth Macaw and Blue Jay, achieve their color via structural coloration, where microscopic feather or scale structures manipulate light. Exceptions, such as the blue-footed booby and blue sea star, gain blue hues from dietary pigments or unique proteins, while the Ogyris olivewing butterfly uniquely produces a true blue pigment.

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Wild WondersBy Wild Wonders