Flamingos find a safe breeding ground at Lake Natron, since most other animals find its caustic environment and high temperature of the lake (up to 60°C) as well as its high salinity inhospitable. It therefore provides a good barrier against predators trying to reach nests on seasonal evaporation islands. Every year, more than two million flamingos come here to lay their eggs and chicks hatch between September and April. Cyanobacteria are increasing with the salinity of the water, and the lake can carry more nests. Larger flamingos also breed in the Wadden Sea.