Het Zwin is a protected nature reserve in the surroundings of Cadzand at the border between Flanders and the Netherlands, in the Belgian communeity of Knokke-Heist and the Dutch community of Sluis.
It is captured between the dunes and a high dike and gets via a ditch in connection with the North Sea. Het Zwin is the last remains of the historical access channel to the medieval Bruges. The nature reserve extends over a coast length of about 2,3 km. The reserve has a surface of 158 hectare. It consists of a dune line with behind salt flats and marshes.
Intertidal area
The Wadden Sea of Het Zwin and its surroundings is a very important area for flora and fauna. Tradtionally certain coastal areas as Het Zwin are used by migratory birds for the foraging. The large variety on plants and animals in such a wadden sea area has certainly to do with this.
Twice a day a large amount of sea water is streaming into the area at high tide. That’s why we call the Zwin an intertidal area. This salty water is taking care of very special circumstances and it creates a unique biotope: flats and marshes. Because of this Het Zwin has a particular richness at plants and it is a paradise for birds. Het Zwin isn’t only an ideal breeding range for plenty of bird species, but also for lots of migratory birds following the coast line it is also an important stop at their long journey.

