1. Finnish Museum of Natural History University of Helsinki Helsinki Finland
2. Department of Biology, Biodiversity Unit Lund University Lund Sweden
3. CREAF Cerdanyola del Vallès Spain
4. InForest Jru (CTFC‐CREAF) Solsona Spain
5. CSIC Cerdanyola del Vallès Spain
6. Institut des Sciences de l'Evolution Université de MontpellierCNRSIRDEPHE Montpellier France
7. Department of Zoology Institute of Ecology and Earth Sciences University of Tartu Tartu Estonia
8. Estonian Ornithological Society Tartu Estonia
9. Sovon Dutch Centre for Field Ornithology GA Nijmegen The Netherlands
10. Department of Animal Ecology & Physiology Institute for Water and Wetland Research Radboud University GL Nijmegen The Netherlands
11. European Bird Census Council GA Nijmegen The Netherlands
12. Department of Bioscience Aarhus University Roende Denmark
13. DOF‐BirdLife Denmark Copenhagen V Denmark
14. Catalan Ornithological Institute Natural History Museum of Barcelona Barcelona Catalonia Spain
15. Natuurpunt Studie Mechelen Belgium
16. Canadian Wildlife Service Environment and Climate Change Canada Ottawa ON Canada
17. UMR7204 Centre d'Ecologie et des Sciences de la Conservation (CESCO UMR 7204) MNHN CNRS Sorbonne Université Paris France
18. Cornell Lab of Ornithology Ithaca NY USA
19. Conservation Science Group Dept of Zoology University of Cambridge Cambridge UK
20. Lab of Ecologie, Systematique & Evolution UMR CNRS 8079 University Paris‐Sud Paris France
21. National Audubon Society San Francisco CA USA
22. Birdlife Estonia/Estonian Ornithological Society Tartu Estonia
23. Département Études Namur Belgium
24. University of Nyíregyháza Nyíregyháza Hungary
25. MME/BirdLife Hungary Budapest Hungary