THE STUDY
cientists have known for a few decades that birds can see many colors that humans can’t. Our retina’s three cones—red, blue, and green—limit the range of hues we can visually detect. But most birds also have another cone type
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cientists have known for a few decades that birds can see many colors that humans can’t. Our retina’s three cones—red, blue, and green—limit the range of hues we can visually detect. But most birds also have another cone type
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