Courageous Black Swans frustrate a Raven attacking their cygnets

The Black Swan (Cygnus atratus) is the only Swan native to Australia and is mostly found in the southeast and southwest of the continent. Black Swans are monogamous and usually breed in permanent, well-vegetated wetlands. This Black Swan family and their four newly-hatched cygnets were on Herdsman Lake in metropolitan Perth. The cygnets began feeding on waterweeds with their mother, then followed her on to the grass by the lake to graze. All of a sudden, an Australian Raven swooped in and tried to grab one