Black swan

Description
Its plumage is black, except for the primary and secondary feathers in the wings, which are white, although they remain hidden when the wings are folded, becoming visible when the swans are in flight. They have a red beak with a white band near the tip. Males and females are very similar in appearance, although the females are smaller. The cygnets are a grey colour with brown specks. 

Ethology
They are monogamous. The females lay 5-6 greenish white eggs that they incubate for 35-40 days with assistance from the male. The chicks are looked after by the parents for 6 months and can be frequently seen riding on their parent’s backs when in the water. They tend to move in flocks and sometimes nest in colonies.

Interesting facts
The black swan is the symbol of the state of Western Australia and appears on its flag. It is very popular in Western Europe as an ornamental aquatic bird, especially in Great Britain. They are considered common pests for certain crops, as they will destroy the vegetation. In some areas of Australia, a controlled hunting season has been established to help control population levels.