1. Department of Wetland Ecology, Doñana Biological Station (EBD-CSIC), Seville, Spain
2. Bird Migration Research Station, Faculty of Biology, University of Gdańsk, Gdańsk, Poland
3. Animal Demography Unit, Department of Biological Sciences, University of Cape Town, Rondebosch, South Africa
4. Conservation Biology Research Group, Department of Anatomy, Cell Biology and Zoology, Faculty of Sciences, University of Extremadura, Badajoz, Spain
5. Department of Zoology, University of Oxford, Oxford, UK
6. Conservation Ecology Group, Groningen Institute for Evolutionary Life Sciences (GELIFES), University of Groningen, Groningen, Netherlands
7. Division of Biological Sciences, University of Montana, Missoula, MT, USA
8. Marine and Environmental Sciences Centre, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
9. Fédération Nationale des Chasseurs, Issy les Moulineaux Cedex, France
10. NIOZ Royal Netherlands Institute for Sea Research, Department of Coastal Systems, Utrecht University, Texel, Netherlands