Black swans are originally from Australia and were introduced to New Zealand in 1864. These striking waterfowl are popular in collections around the world.
They are less aggressive than other swans and often nest in colonies. Their nests are large affairs constructed from reeds and other aquatic vegetation. Incubation lasts around 36 days and the cygnets develop slowly and may be over 5 months old before they are able to fly.
In Europe they often nest very early in the year, often hatching their eggs when their is still snow on the ground.