Curious Daily
In 2006, researchers at the University of Washington in Seattle set out to test whether crows could recognize human faces.
They wore rubber masks while catching and tagging a small group of wild crows on campus, then let the birds go unharmed.
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Afterwards, when anyone walked around wearing that same 'dangerous' mask, crows would gather, dive and loudly scold them.
When people wore a different, 'neutral' mask, the crows mostly ignored them. The birds were clearly reacting to the face.
