sentences:  Many shore birds, including cormorants, mute swans, greylag geese, pintails, shovelers, eiders, avocets, several species of waders, as well as gulls and terns are breeding in the area.The porpoise lives in the area.On October 2, 1943, the old ferry harbor in Gronsund was also a location used by the Danish resistance to transport fleeing Danish Jews on fisherman boats to Sweden to escape the German attempt to round up the Danish Jews, as detailed in Bo Lidegaard's book Countrymen.