About the Authors
- Raeann Mettler
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* E-mail: raeann.mettler@gmail.com
Affiliation Department of Evolutionary Biology and Animal Ecology, University of Freiburg, Freiburg, Germany
- H. Martin Schaefer
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Affiliation Department of Evolutionary Biology and Animal Ecology, University of Freiburg, Freiburg, Germany
- Nikita Chernetsov
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Affiliation Biological Station Rybachy, Zoological Institute, Rybachy, Kaliningrad Region, Russia
- Wolfgang Fiedler
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Affiliations Max Planck Institute for Ornithology, Vogelwarte, Radolfzell, Germany, University of Konstanz, Department of Biology, Konstanz, Germany
- Keith A. Hobson
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Affiliation Environment Canada, Science and Technology Branch, Saskatoon, Saskatchewan, Canada
- Mihaela Ilieva
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Affiliation Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia, Bulgaria
- Elisabeth Imhof
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Affiliation Wildlife Ecology and Management, University of Freiburg, Freiburg, Germany
- Arild Johnsen
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Affiliation Natural History Museum, University of Oslo, Oslo, Norway
- Swen C. Renner
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Affiliations Institute of Experimental Ecology, Ulm University, Ulm, Germany, Smithsonian Conservation Biology Institute, Front Royal, United States of America
- Gregor Rolshausen
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Affiliation Redpath Museum & Department of Biology, McGill University, Montreal, Quebec, Canada
- David Serrano
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Affiliation Department of Conservation Biology, Estación Biológica de Doñana (EBD-CSIC), Sevilla, Spain
- Tomasz Wesołowski
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Affiliation Laboratory of Forest Biology, Wrocław University, Wrocław, Poland
- Gernot Segelbacher
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Affiliation Wildlife Ecology and Management, University of Freiburg, Freiburg, Germany
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: HMS GS RM. Performed the experiments: RM GS. Analyzed the data: RM GS. Contributed reagents/materials/analysis tools: RM KAH NC MI EI AJ SCR DS GR TW WF. Wrote the manuscript: RM GS HMS. Analyzed isotope samples: KAH.