Birds of the corvid family such as crows, magpies and ravens have built quite a reputation for their smarts, with a history of hitching rides on bald eagles and remembering the faces of their captors. Researchers have further explored this trait in ravens by intentionally ripping the poor birds off in a trade, then returning at a later date to see whether they remember being hard done by.
.. Continue Reading Ripped-off ravens sure can hold a grudgeCategory: Biology
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from New Atlas http://ift.tt/2scxwJS
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