â–´ Peacock Display
The vivid blue of a peacock’s feathers is more than just eye-catching – it's a fascinating example of how nature creates color without pigments. In fact, true blue pigments are rare in nature. For many organisms, producing blue would require absorbing longer wavelengths (like the complementary color orange), which are lower in energy and thus less optimal for driving biological processes such as photosynthesis.
Instead, peacocks (and some other animals) achieve their dazzling blue through structural coloration. Tiny, ordered nanostructures in their feathers interfere with light in a way that reflects only the blue portion of the spectrum, a phenomenon known as iridescence. This kind of coloration is often used for display, communication, or even as a warning.
By contrast, most animals get their colors from what they eat. Flamingos, for example, turn pink from carotenoids in their diet. That makes structural blue even more remarkable!
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