The 'Kwade Hoek' is a dynamic tidal area. It used to be called "the croaking corner" because of the treacherous current. The sea is still the boss in the Kwade Hoek. Fortunately, the nature reserve at the Delta Works remained outside the dikes. Especially in winter, the salt water flows through channels and creeks far into the area. Large tracts of land are flooded. Wind, water and tide constantly move the landscape. On the northeast side are mud flats, salt marshes and creeks where salt-loving plants such as sea lavender and real spoon leaf grow. Godwit, avocet and redshank breed here.