Backyard songbirds, like cardinals and chickadees, see the world with visual clarity surpassing human eyesight. Acute bird vision derives from the retina's fovea - the center of sharpest vision - that ...
Get exclusive reporting, live Q&As and ad-free reading. LiveScience If optimists see the world through rose-colored lenses, some birds see it through ultraviolet ones. Avians have evolved ultraviolet ...
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