1. Department of Biological Applications and Technology, University of Ioannina, Ioannina, Greece
2. Society for the Protection of Prespa, Agios Germanos, Greece
3. Kerkini National Park Management Body, Kerkini, Greece
4. Albanian Ornithological Society (AOS), Tirana, Albania
5. Natural Environment and Climate Change Agency, Athens, Greece
6. Faculty of Sciences, Department of Biology, Natural History Museum — Ege University Bornova, Izmir, Turkey
7. – Bulgaria”, Branta Birding Lodge and Conservation Centre Foundation “Le Balkan , Durankulak, Bulgaria
8. Research Institute of Tour du Valat, Arles, France