1. Research and Technology Centre (FTZ) University of Kiel Büsum Germany
2. Littoral Environnement et Sociétés Laboratory (LIENSs) La Rochelle University – CNRS La Rochelle France
3. Bionum GmbH – Consultants in Biological Statistics Hamburg Germany
4. UMR7204 CESCO, Museum National D'Histoire Naturelle, CNRS, Sorbonne Université Paris France
5. Birdlife Estonia Tartu Estonia
6. 'Lendület' Landscape and Conservation Ecology Institute of Ecology and Botany, Centre for Ecological Research Vácrátót Hungary
7. Natural Resources Institute Finland Helsinkiarkus Finland
8. Finnish Museum of Natural History Helsinki Finland
9. National Nature Reserve of Moëze‐Oléron LPO Ligue pour la Protection des Oiseaux Saint‐Froult France