If you try to chase ravens from your yard, then, you may want to stop and reconsider what you’re doing. Crows, ravens and other corvids are not keen on forgiving or forgetting.
The biologist John M. Marzluff put this idea to the test at the University of Washington campus in Seattle were seven crows tagged and released on the campus by researchers wearing masks.
The scary and neutral masks were worn around campus to provoke a reaction from the birds. The crows scolded people wearing the “dangerous” masks by swooping and dive-bombing. Scary right!