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When a hawk and owl face off, who wins? Sometimes neither.Q:I’ve noticed that starlings in winter have dark-colored beaks, instead of the yellow color in summer. I understand how birds’ plumage can change color after a molt, but how can a beak change?
Learn about our Editorial Policies. Indeed, as Brawn and his colleagues published in 2010, sleep helps starlings learn new discrimination tasks. The researchers trained the birds to stick their beaks ...
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