The Northern Hemisphere species of swan have pure white plumage but the Southern Hemisphere species are mixed black and white. The Australian Black Swan (Cygnus atratus) is completely black except for the white flight feathers on its wings; the chicks View Full →
Swans usually mate for life, though ‘divorce’ does sometimes occur, particularly following nesting failure.
There are two collective nouns for a group of swans. A group on the ground is known as a ‘bank’, while a group in flight is called a ‘wedge’ of swans.
The number of eggs in a swan clutch ranges from three to eight.
The current global population of black swans is estimated to be up to 500,000 individuals.