About the Authors

Marius Somveille

ms2008@cam.ac.uk

Affiliations Department of Zoology, University of Cambridge, Cambridge, United Kingdom, Centre d’Ecologie Fonctionnelle et Evolutive, CNRS-CEFE UMR5175, Montpellier, France

Andrea Manica

Affiliation Department of Zoology, University of Cambridge, Cambridge, United Kingdom

Stuart H. M. Butchart

Affiliation BirdLife International, Wellbrook Court, Cambridge, United Kingdom

Ana S. L. Rodrigues

Affiliation Centre d’Ecologie Fonctionnelle et Evolutive, CNRS-CEFE UMR5175, Montpellier, France

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AM AR MS. Analyzed the data: MS. Wrote the paper: MS SB AR AM. Co-coordinated the data collection: SB. Verified and corrected the data for migratory species: MS.