About the Authors

Ana G. Popa-Lisseanu

To whom correspondence should be addressed. E-mail: anapopa@ebd.csic.es

Affiliation Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (CSIC), Sevilla, Spain

Antonio Delgado-Huertas

Affiliation Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Granada, Spain

Manuela G. Forero

Affiliation Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (CSIC), Sevilla, Spain

Alicia Rodríguez

Affiliation Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Granada, Spain

Raphaël Arlettaz

Affiliations Division of Conservation Biology, Zoological Institute, University of Bern, Bern, Switzerland, Swiss Ornithological Institute, Valais Field Station, Nature Centre, Salgesch, Switzerland

Carlos Ibáñez

Affiliation Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (CSIC), Sevilla, Spain

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.