Image: Frontiers, Dinets
Dr Vladimir Dinets from the University of Tennessee observed a Cooper’s hawk using a line of cars waiting at a red light to hide its approach when hunt smaller birds outside a house in his neighbourhood. Further observation revealed that the Hawk learned that when the pedestrian crossing signal was pressed, the lights stayed red for longer and resulted in a longer line of cars which made it easier for the hawk to stay hidden. As a result, the hawk only began its approach when it heard the audible pedestrian signal from the traffic lights.
Source:
