Crows are mighty smart birds: They share with humans (MOST humans, anyway) the ability to recognize faces and associate them with negative, as well as positive, feelings.

Researchers documented this by having some people feed captured crows while wearing negative masks, while others fed them wearing positive masks. In, Sandra Hines environmental scientist John Marzluff as saying, "The regions of the crow brain that work together are not unlike those that work together in mammals, including humans. These regions were suspected to work in birds but not documented until now.
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