Swans display more aggression to fellow swans than other birds, new research shows.
The study examined three swan species – mute, whooper and Bewick’s – and found all were most frequently aggressive to their own kind.
The findings suggest that similar individuals are the greatest competition for food and other resources such as shelter, which can lead to conflict.
The research, by the Wildfowl and Wetlands Trust (WWT) and the University of Exeter, was undertaken to better understand how swan behaviour affects other waterbirds over winter. MORE