About the Authors

Mariëlle L. van Toor

mvantoor@orn.mpg.de

Affiliations Department of Migration and Immuno-Ecology, Max Planck Institute for Ornithology,Radolfzell, Germany, Department of Biology, University of Konstanz, Konstanz, Germany

Anders Hedenström

Affiliation Department of Biology, Lund University, Lund, Sweden

Jonas Waldenström

Affiliation Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, Sweden

Wolfgang Fiedler

Affiliation Department of Migration and Immuno-Ecology, Max Planck Institute for Ornithology,Radolfzell, Germany

Richard A. Holland

Affiliation School of Biological Sciences, Queen’s University Belfast, United Kingdom

Kasper Thorup

Affiliation Center for Macroecology, Evolution and Climate, Natural History Museum of Denmark, University of Copenhagen, Copenhagen, Denmark

Martin Wikelski

Affiliations Department of Migration and Immuno-Ecology, Max Planck Institute for Ornithology,Radolfzell, Germany, Department of Biology, University of Konstanz, Konstanz, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AH JW RAH KT WF MW. Performed the experiments: MLT JW WF MW. Analyzed the data: MLT JW WF RAH KT MW. Wrote the paper: MLT AH JW RAH WF KT MW.