About the Authors

Karl L. Evans

karl.evans@sheffield.ac.uk

Affiliation Department of Animal and Plant Sciences, University of Sheffield, Sheffield, United Kingdom

Jason Newton

Affiliation UK NERC Life Sciences Mass Spectrometry Facility, SUERC, East Kilbride, United Kingdom

John W. Mallord

Affiliation Royal Society for the Protection of Birds, The Lodge, Sandy, Beds, United Kingdom

Shai Markman

Affiliation Department of Biology, University of Haifa – Oranim, Tivon, Israel

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KLE JN. Performed the experiments: KLE JN JM SM. Analyzed the data: KLE JN. Contributed reagents/materials/analysis tools: KLE JN JM SM. Wrote the paper: KLE JN JM SM.