Crows recognize and mob aggressive humans

Hitchcockian crows gossip about mean humans - Technology & science - Science - LiveScience - msnbc.com:

This article has a misleading title, since the crows are only attacking humans who have abused them. The exciting and new part is that the crows seem to communicate to other crows about which humans are dangerous.
"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.

'Most of the birds that are scolding us are not the ones we captured,' said study researcher John Marzluff, a professor of wildlife science at the University of Washington and an occasional victim of crow attacks. 'It's likely that they're learning from their parents and their peers that this dangerous person is still out there.'"
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Photo by D'Arcy Allison-Teasley