It is very unusual to see birds in Rio Tinto by the acidity of the water. After several days of torrential rain, fresh water has washed the river dragging the acid and making a living ecosystem for birds that have come from the neighboring marshes of Odiel. I focused on this flight with a group of pink flamingos on the edge of the delta. Also the place where they were was recorded exceptional beauty in the mud that had formed in the shallow sea and the emerald green waters of the Tinto.