The lagoon is separated from the Baltic Sea by a geologically active spit that is subject to constant shifts due to sea currents and storms.
The site was once part of a larger coastal formation that has been modified over centuries by land reclamation and changing sea levels.
It acts as a primary staging point on the East Atlantic Flyway, accommodating thousands of geese during peak migration periods.
The reserve contains specialized halophytic plants, such as sea aster and sea plantain, which can tolerate the brackish water environment.
The water level within the lagoon is influenced by both precipitation and periodic influxes of seawater during high storm surges.
Schwansener See is a 200-hectare nature reserve located on the Baltic Sea coast near the Schlei inlet. The area is a protected brackish lagoon separated from the sea by a narrow coastal barrier of dunes and sand bars. It serves as a vital resting and breeding ground for migratory birds, including graylag geese, lapwings, and various species of ducks. The landscape consists of a mosaic of shallow waters, reeds, and salt meadows. Managed by NABU, the site features a birdwatching hide providing vantage points for observing avian activity without disturbing the habitat. Coastal hiking trails flank the reserve, offering views of both the lagoon and the Baltic coastline. The vegetation is adapted to saline soil conditions, resulting in unique salt-marsh flora. It is an important site within the Schleswig-Holstein coastal conservation network.
The birdwatching hide overlooking the main body of the lagoon.
Bring high-quality binoculars or a spotting scope, as observation points are set back to maintain bird safety.
Wear waterproof, sturdy hiking boots, as the coastal paths can be muddy or uneven in the meadow sections.
Check the local wind forecast, as the exposed coastal location can be significantly colder and windier than inland areas.
Attempting to walk on the dunes or the narrow sand barrier, which are strictly protected zones; bringing dogs, which are prohibited in the core sanctuary area.
Stay strictly on marked paths to protect nesting sites; keep noise levels low; do not approach or feed wildlife.
