1. RSPB Centre for Conservation Science The Lodge Sandy UK
2. Conservation Ecology Group, Groningen Institute for Evolutionary Life Sciences University of Groningen Groningen The Netherlands
3. RSPB The Lodge Sandy UK
4. British Antarctic Survey Cambridge UK
5. Staatsbosbeheer Súdwest‐Fryslân Oudemirdum The Netherlands
6. Vogelbescherming Nederland Zeist The Netherlands
7. Department of Coastal Systems NIOZ Royal Netherlands Institute for Sea Research Texel The Netherlands
8. School of Biological Science University of East Anglia Norwich UK