Puffins are known for their flashy bills, striped like a giant piece of candy-corn. New research has found that the bills of Atlantic Puffins glow brightly under ultraviolet blacklights. Neon, curved streaks appeared between the different colored segments of a puffin’s bill in this lighting. It’s possible that the UV highlights help the birds further stand out to potential mates. For the experiment, researchers made special puffin sunglasses to protect the birds’ eyes.

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