Magpies can recognize themselves in a mirror. Crows, however, can recognize you. A recent study in the Seattle area has shown that crows can distinguish individual humans. They know if you’ve been naughty or nice, politely following people who fed them, and actively harassing people who treated them poorly, trapping them for study, for example. The birds need not have first-hand experience with the person recognized. They can be taught to recognize individuals by their parents or other crows in their flock. Similar behavior has been seen in gulls and other bird species. The study was reported in The New York Times.

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