1. Institute for Biochemistry and Biology University of Potsdam Potsdam Germany
2. Geography Department Humboldt‐Universität zu Berlin Berlin Germany
3. Department of Ecology University of Innsbruck Innsbruck Austria
4. Department of Biology, Max Planck Institute of Animal Behavior University of Konstanz Radolfzell Germany
5. British Trust for Ornithology Thetford Norfolk UK
6. European Union for Bird Ringing c/o British Trust for Ornithology Norfolk UK
7. Center for Macroecology Evolution and Climate, Globe Institute University of Copenhagen Copenhagen Denmark
8. Natural History Museum of Denmark University of Copenhagen Copenhagen Denmark