1. Vogelwarte Hiddensee; Zoological Institute and Museum; University of Greifswald; Soldmannstr. 23 D-17489 Greifswald Germany
2. Department of Mathematics and Computer Science; University of Greifswald; Walther-Rathenau-Str. 4717487 Germany
3. Grüner Weg 3; 19395 Plau am See Ortsteil (OT) Karow Germany
4. Kiefernweg 3; 14055 Berlin Germany