Swans usually mate for life, though ‘divorce’ does sometimes occur, particularly following nesting failure.
The word swan is derived from Old English swan, akin to the German Schwan and Dutch zwaan and Swedish svan, in turn derived from Indo-European root *swen (to sound, to sing), whence Latin derives sonus (sound)
The current global population of black swans is estimated to be up to 500,000 individuals.
A mature Black Swan measures between 110 and 142 cm (43-56 in) in length and weighs 3.7–9 kg (8.1-20 lbs). Its wing span is between 1.6 and 2 metres (5.3-6.5 ft). Relative to their size, black swans have longer necks View Full →
Swan eggs hatch after about 45 days of incubation.