The lesser flamingo (Phoeniconaias minor) relies almost entirely on Lake Natron in Tanzania for breeding — one of the most hostile environments on Earth. A single failed breeding season at this hyper-alkaline soda lake can devastate the species' global reproduction.
Lesser flamingo chicks with sodium encrustation cannot walk or swim properly, suffering progressive immobilisation and death without intervention. Welfare rescue operations have treated thousands of encrusted chicks, removing caustic deposits and rehydrating affected birds. The concentrated breeding strategy — while evolutionarily sound as a predator-avoidance mechanism — means a single catastrophic event can cause mass mortality. Breeding failure years, which occur when lake levels are incorrect, result in mass chick starvation and abandonment. Conservation welfare focuses on protecting Lake Natron from industrial disturbance and monitoring breeding success annually.