'Swan' is the common gender term for the species but males are known as ‘cobs’ and females as ‘pens', Young or immature birds are known as 'cygnets'.
The Black Swan (Cygnus atratus) is a large water-bird which breeds mainly in the southeast and southwest regions of Australia. They have been successfully bred here at South East Ornamental Birds as you can see in the pictures below.
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). The neck is long and curved in an "S". The Black Swan is quite a vocal bird and its sound has been likened to that of a 'didgeridoo'. It can also whistle, especially when disturbed while breeding and nesting.