Humans who dismiss birds as featherweights may revise their opinion when learning of crows which not only can identify the face of someone who is a danger but also teach others about the threat.
Humans who dismiss birds as featherweights may revise their opinion when learning of crows which not only can identify the face of someone who is a danger but also teach others about the threat.
Intrigued by the behaviour of wild American crows (Corvus brachyrhynchos) on their campus in Seattle , University of Washington scientists explored whether the birds would recall a face associated with a frightening ordeal.
