The nature reserve of Mettnau was established in 1926 by the town of Radolfzell, but only expanded to its current size of 140 hetctaresin 1984.[1] A pond was accidentally created when the peninsula was used as a landfill. The pond is independent of fluctuations in the water of Lake Constance, making it an attractive place for hatching ducks. It is close to the nutrient-rich shallow-water zones of Markelfingen corner, which provides food for the ducks and their offspring.
References and sources
Peter Berthold, Karl Mühl and Siegfried Schuster: Naturschutzgebiet Halbinsel Mettnau: Geschichte - Natur - Landschaft, Ornithologische Arbeitsgemeinschaft Bodensee, Constance, 1979