On Jan 5, 2011, Fires_in_motion from Vacherie, LA (Zone 9a) wrote:
These stunning birds can be found living year-round (or close to year-round) in Lafreniere Park in Kenner, LA (a suburb of New Orleans). Regular white ones live there too, but the black ones are the stars of the lake.
On Oct 15, 2012, RosinaBloom from Waihi New Zealand wrote:
Although introduced from Australia in the 1860s, the Black Swan also reached New Zealand naturally at the same time. It prefers permanent fresh or brackish water for breeding. Their diet is mainly leaves and shoots of aquatic plants. Only about one in five nest in any one year. They heap plant material in piles to make their nests. Usually 6 eggs are laid and hatched five weeks later - incubation is by both parents. Cygnets are led to water within 24 hours of hatching. The fledging period varies between 95 to more than 140 days. For most of their pre breeding life they frequent marine or estuarine habitats. Most return to breed where they were born. Some live for up to twenty years.