1. Bach Freilandforschung Bremen Germany
2. Leibniz Institute for Zoo and Wildlife Research Berlin Germany
3. Sodwiese 1 Stocksee Germany
4. Institute of Avian Research Wilhelmshaven Germany
5. Avitec Research GbR Osterholz‐Scharmbeck Germany
6. Wageningen Marine Research AG Den Helder The Netherlands
7. Institute for Biology and Environmental Sciences (IBU), Carl von Ossietzky University of Oldenburg Oldenburg Germany
8. NABU Mecklenburg‐Vorpommern Schwerin Germany