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Description
The Grüne Insel is a former island in the estuary of the river Eider. Today it is not influenced by the water levels of the estuary anymore and is instead shaped by the groundwater levels that change during the seasons. The wet meadows provide a home for species that have become rare in the rest of the landscape like Vanneau huppé or Chevalier gambette.
The shallow ponds are great to have a look in migration season when all kinds of waders can be seen there like Bécasseau cocorli, Bécasseau de Temminck, Combattant varié or Chevalier arlequin. Note that the occurance of these species is dependent on the water levels. Because the observation distances can be quite high it is almost necessary to have spotting scope.
In the ditches next to the road you also have a good chance to see a hear reed breeding species like Phragmite des joncs, Bruant des roseaux and Gorgebleue à miroir in spring and summer.
Late autumn is the best time to watch geese. With a bit of luck you can spot rarer species like Oie à bec court or Bernache à cou roux under the Bernache nonnette and Oie cendrée.
Détails
Accès
Grüne Insel is located south of the town of Tönning. From the trainstation in Tönning it takes you around 20 minutes with the bike to the area. You can also park the car next to the observation tower. Press P on the map for directions.