Yes, There's a War on Swans

In the summer of 2009, two families of swans that make their home in Brooklyn’s Prospect Park started a turf war.

That year, two adult swan pairs living on the park’s 60-acre lake both began raising baby cygnets, upsetting an uneasy coexistence. Soon, the larger of the two families (one ended up with four surviving offspring, the other only one) began making a move to the lake’s northern shore. During the journey, the dominant male attacked the smaller swan family, looking, as the New York Times’ City Room blog put it at the time, “as if he’s trying to drown them.”