About the Authors

Michael Stocks

‡ These authors contributed equally to this work.

Affiliations Department of Animal and Plant Sciences, University of Sheffield, Sheffield, United Kingdom, Department of Plant Ecology and Evolution, Uppsala University, Uppsala, Sweden

Rebecca Dean

r.dean@ucl.ac.uk (RD); urban.friberg@liu.se (UF)

‡ These authors contributed equally to this work.

Affiliations Department of Evolutionary Biology, Uppsala University, Uppsala, Sweden, Department of Genetics, Evolution and Environment, University College London, London, United Kingdom

Björn Rogell

Affiliations Department of Animal Ecology, Uppsala University, Uppsala, Sweden, Department of Zoology, Stockholm University, Stockholm, Sweden

Urban Friberg

r.dean@ucl.ac.uk (RD); urban.friberg@liu.se (UF)

Affiliations Department of Evolutionary Biology, Uppsala University, Uppsala, Sweden, IFM Biology, AVIAN Behaviour and Genomics group, Linköping University, Linköping, Sweden

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: RD MS UF. Performed the experiments: RD. Analyzed the data: RD MS BR UF. Wrote the paper: MS RD BR UF.