Birds-of-paradise are sending secret color signals invisible to human eyes, scientists say Many types of birds _ such as hummingbirds, peacocks and parrots _ are vividly colorful, but birds-of-paradise are especially flamboyant with hues of emerald, lemon, cobalt and ruby. Now, research has revealed these stunning birds are also sending secret color signals that are invisible to human eyes. Plumage and body parts of birds-of-paradise glow in certain areas when viewed under ...
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