The swan is said to peck other birds before climbing on top of them and drowning them. Bird rescuer Maria Evans said Mr Nasty had killed 10 swans since 21 June alone, but the figure could be higher.

These same grains can be traced into the modern Swan River estuary and the Avon ... "Perth is sitting on a continental margin that is drowning," Dr. Zametzer said. "Rottnest Island used to be ...