Black seals in the Wadden Sea National Park of Lower Saxony Winter/Spring 2010/2011 (UIG) Grey seals in the Wadden Sea National Park of Lower Saxony

In order to get a more detailed picture of the stock on site, the National Park Administration conducts special survey flights in winter and spring. In winter, the offspring are born and in spring the annual coat changes of the seal seals — both stages of life offer a good opportunity to count the animals on land.