Mr Asbo
In my home-town there was a notorious swan named Mr Asbo (Anti-Social-Behavioural- Order) who'd terrorize pedestrians and rowers alike. There was even a rumour he broke someone's arm once. He did have a singular friendship with an old curmudgeon in a grey house-boat who fed him bread and also loved verbally accosting rowers. Mr Asbo's behaviour eventually got so bad that they had to move him to a remote pond in the fens, the oddest thing was the Man in the houseboat seemed to have left with him.