High Quality Content by WIKIPEDIA articles! Wadden Sea National Park (Nationalpark Vadehavet) was named a Danish national park on 17 January 2008, starting from 2010. The national park covers the Danish part of the Wadden Sea from Ho Bugt until the German border, and consists of the islands of Fanø, Mandø and Rømø, as well as Skallingen, Varde Å valley and many of the marshlands of Tjæreborgmarsken, Ribemarsken, Margrethekogen and De ydre diger i Tøndermarsken.The Wadden Sea is known for its large number of migratory birds and for the large flocks of European Starlings which fly in formations known as the Sort sol.