4. Crows revenge and hold grudges
A research conducted by scientists at the University of Washington shows that, crows have an uncanny ability to recognize faces and to publicize to let their community know who’s a threat.
While trapping crows for research. they noticed that the birds began harassing them whenever they stepped out of the office, not minding how often they change their clothes. To further ascertain what was really going on; they put on different masks as they continue trapping the birds. But the birds wouldn’t leave them alone when they walk around campus later wearing the same masks. One of the researchers even put on a mask used five years ago for trapping, surprisingy, the birds descended on him. Does that mean the older ones successfully spread the warning of which faces were good and bad?