An American crow. CREDIT: stock.xchng View full size image

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.