1. Aarhus University, Department of Bioscience, Kalø, Grenåvej 14, DK-8410 Rønde, Denmark
2. Ravnhøj Consult, Tørning Banke 24, DK-6500 Vojens, Denmark
3. University of Helsinki, The Helsinki Lab of Ornithology, Finnish Museum of Natural History, P.O. Box 17, FI-00014, Finland
4. Finnish Environment Institute (SYKE), Biodiversity Centre, P.O. Box 140, FI-00251 Helsinki, Finland
5. Landesamt fur Umwelt, Naturschutz und Geologie MV, Goldberger Str. 12, D-18273 Gustrow, Germany
6. Leibniz Institute for Zoo and Wildlife Research, Department Wildlife Diseases, Alfred-Kowalke-Strasse 17, 10315 Berlin, Germany
7. Naturvårdsverket, Valhallavägen 195, 100648 Stockholm, Sweden
8. Estonian University of Life Sciences, Institute of Agricultural and Environmental Sciences, 5 Kreutzwaldi Street, 51005 Tartu, Estonia
9. Am Stegebach 11, D-18209 Bartenshagen, Germany
10. St. Petersburg State University, Department of Vertebrate Zoology, 7–9, Universitetskaya nab., St. Petersburg, 199034, Russian Federation