1. Faculty of Science, Institute for Environmental Studies Charles University Prague 2 Czech Republic
2. Institute of Vertebrate Biology Czech Academy of Sciences Brno Czech Republic
3. Center for Theoretical Study Charles University and the Czech Academy of Sciences Prague Czech Republic
4. Euring and British Trust for Ornithology, The Nunnery Thetford UK
5. Catalan Ornithological Institute Nat‐Museu de Ciències Naturals de Barcelona Barcelona Spain
6. Bird Ringing Centre, National Museum Prague 10 Czech Republic
7. Mécanismes adaptatifs et évolution (MECADEV UMR 7179), Muséum National d’Histoire Naturelle, Centre National de la Recherche Scientifique Brunoy France
8. Centre de Recherches sur la Biologie des Populations d'Oiseaux (CRBPO), Centre d'Ecologie et des Sciences de la Conservation (CESCO UMR 7204), Muséum National d'Histoire Naturelle, Centre National de la Recherche Scientifique Sorbonne Université Paris France
9. Department for Environmental Research and Monitoring Swedish Bird Ringing Centre, The Swedish Museum of Natural History Stockholm Sweden
10. Vogeltrekstation—Dutch Centre for Avian Migration and Demography Netherlands Institute of Ecology (NIOO‐KNAW) Wageningen The Netherlands
11. Hungarian Bird Ringing Centre, BirdLife Hungary Budapest Hungary
12. The Finnish Museum of Natural History University of Helsinki Helsinki Finland
13. Grimma Germany
14. SEO/BirdLife, Ciencia Ciudadana Madrid Spain
15. Natural Resources Institute Finland Helsinki Finland
16. Natural History Museum of Denmark University of Copenhagen Copenhagen Denmark
17. Department of Zoology, Faculty of Science Palacký University Olomouc Czech Republic