A flock of greater flamingos (Phoenicopterus roseus) flying over a salina. In salinas, flamingos find the food they need, such as small crustaceans and unicellular algae. Some of these algae, like Dunaliella salina, develop red pigments to survive in this extreme environment of salinity, and flamingos are able to assimilate and fix them in their plumage, beak and legs. The intensity of red color will play an important role in the next rut.