About the Authors

Simone Tenan

simone.tenan@mtsn.tn.it

Affiliations Population Ecology Group, Mediterranean Institute for Advanced Studies (Consejo Superior de Investigaciones Científicas–University of the Balearic Islands), Esporles, Mallorca, Spain, Sezione Zoologia dei Vertebrati, Museo delle Scienze, Trento, Italy, Dipartimento di Scienze della Terra e dell'Ambiente, Università di Pavia, Pavia, Italy

Jaume Adrover

Affiliation Grup d'Ornitologia Balear i defensa de la naturalesa, Palma, Mallora, Spain

Antoni Muñoz Navarro

Affiliation Grup d'Ornitologia Balear i defensa de la naturalesa, Palma, Mallora, Spain

Fabrizio Sergio

Affiliation Department of Conservation Biology, Estacion Biologica de Doñana - CSIC, Seville, Spain

Giacomo Tavecchia

Affiliation Population Ecology Group, Mediterranean Institute for Advanced Studies (Consejo Superior de Investigaciones Científicas–University of the Balearic Islands), Esporles, Mallorca, Spain

Competing Interests

The authors have the following competing interest to declare. The project was partly funded by a commercial source (Gesa-Endesa). This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials..

Author Contributions

Analyzed the data: ST GT. Wrote the paper: ST GT FS. Field work: JA AMN.