Lake Natron is a soda lake. It is the only breeding ground for Lesser Flamingos (the pink ones) in East Africa. They are attracted to the large quantity of algae that grows in the sodium carbonate rich waters. The lake changes size over the seasons. We walked out across the dry bed to where there was still water to spy on the Flamingos. They make odd grunting noises. We didn’t get close enough to see any babies – they often get a build up of sodium carbonate around their ankles which makes them too heavy to fly, and they perish.