About the Authors

Kasper Thorup

kthorup@snm.ku.dk

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

Troels Eske Ortvad

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

Jørgen Rabøl

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

Richard A. Holland

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

Anders P. Tøttrup

Affiliation Department of Biology, Center for Macroecology, Evolution and Climate, University of Copenhagen, Copenhagen, Denmark

Martin Wikelski

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

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KT TEO JR RAH APT MW. Performed the experiments: KT TEO JR RAH APT. Analyzed the data: KT TEO JR RAH APT MW. Wrote the paper: KT TEO JR RAH APT MW.