3.7 - 9 Kilograms
They feed on aquatic plants, grasses and reeds.
The black swan's preferred habitat extends across fresh, brackish and salt water lakes, swamps and rivers with underwater and emergent vegetation for food and nesting materials.
Black swans are mostly black-feathered birds, with white flight feathers. The bill is bright red, with a pale bar and tip; and legs and feet are greyish-black. Cobs (males) are slightly larger than pens (females), with a longer and straighter bill. Cygnets (immature birds) are a greyish-brown with pale-edged feathers.It is the only swan in Australia that isn’t introduced. They feed on aquatic plants, grasses and reeds. This bird is very special to us here in Perth as the Black Swan is Western Australia’s Bird Emblem, and it appears on our State Flag. The black swan is common in the wetlands of southwestern and eastern Australia and adjacent coastal islands.