Flamingos are flamboyantly colored birds, displaying startling shades of pink, red, or orange.
With their bright feathers and strongly hooked bills, flamingos are among the most easily recognized water birds. Flamingos are social birds, and tens of thousands can live together in a single colony.
Flamingos are one of the oldest species of birds, with fossil remains dating back 30 to 50 million years. They live in tropical and sub-tropical latitudes, either far inland or in large lakes or lagoons, such as tidal flats or mangrove swamps close to the sea.
Source, http://www.webexhibits.org/causesofcolor/7D.html