Today the Wadden Sea was listed by the UNESCO as a World Heritage site. Our most important nature reserve gets more recognition and hopefully also better protection. This picture shows an a typical winter image of a largely frozen sea with a large group of Oystercatchers.
From the description on the UNESCO-website:
The Wadden Sea is the largest unbroken system of intertidal sand and mud flats in the world, with natural processes undisturbed throughout most of the area. It encompasses a multitude of transitional zones between land, the sea and freshwater environment, and is rich in species specially adapted to the demanding environmental conditions. It is considered one of the most important areas for migratory birds in the world, and is connected to a network of other key sites for migratory birds. Its importance is not only in the context of the East Atlantic Flyway but also in the critical role it plays in the conservation of African-Eurasian migratory waterbirds. In the Wadden Sea up to 6.1 million birds can be present at the same time, and an average of 10-12 million pass through it each year.