About the Authors

Amy S. I. Wade

Affiliation Centre for Agri-Environmental Research, School of Agriculture, Policy and Development, University of Reading, Reading, United Kingdom

Boris Barov

Affiliation BirdLife Europe, Brussels, Belgium

Ian J. Burfield

Affiliation BirdLife International, Cambridge, United Kingdom

Richard D. Gregory

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

Ken Norris

Affiliation Centre for Agri-Environmental Research, School of Agriculture, Policy and Development, University of Reading, Reading, United Kingdom

Petr Vorisek

Affiliations Czech Society for Ornithology, Prague, Czech Republic, Department of Zoology and Laboratory of Ornithology, Faculty of Science, Palacký University, Olomouc, Czech Republic

Taoyang Wu

Affiliation School of Computing Sciences, University of East Anglia, Norwich Research Park, Norwich, United Kingdom

Simon J. Butler

simon.j.butler@uea.ac.uk

Affiliation School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, United Kingdom

Competing Interests

We have the following interests. This work was partly supported by the Alliance for Beverage Cartons and the Environment (ACE). There are no patents, products in development or marketed products to declare. This does not alter the authors adherence to all the PLOS ONE policies on sharing data and materials, as detailed online in the guide for authors.

Author Contributions

Conceived and designed the experiments: SJB KN IJB RDG BB. Performed the experiments: ASIW SJB. Analyzed the data: ASIW SJB TW PV. Wrote the paper: ASIW SJB.