About the Authors

Ana G. Popa-Lisseanu, Manuela G. Forero, Carlos Ibáñez
Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (CSIC), Sevilla, Spain

Antonio Delgado-Huertas, Alicia Rodríguez
Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Granada, Spain

Raphaël Arlettaz
Division of Conservation Biology, Zoological Institute, University of Bern, Bern, Switzerland

Raphaël Arlettaz
Swiss Ornithological Institute, Valais Field Station, Nature Centre, Salgesch, Switzerland

Corresponding Author

anapopa@ebd.csic.es

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AP CI MF. Performed the experiments: AP CI AD AR. Analyzed the data: RA AP CI MF. Contributed reagents/materials/analysis tools: AD AR. Wrote the paper: RA AP.