The common crow knows when you're out to get him — and he's likely to teach his friends and family to watch out for you, a new study finds.
In results that can only be described as Hitchcockian, researchers in Seattle who trapped and banded crows for five years found that those birds don't forget a face. Even after going for a year without seeing the threatening human, the crows would scold the person on sight, cackling, swooping and dive-bombing in mobs of 30 or more.
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