1. WildCRU, Zoology DepartmentThe Recanati‐Kaplan CentreUniversity of Oxford Tubney, Abingdon UK
2. Netherlands Institute of EcologyNIOO‐KNAW Wageningen Netherlands
3. CEFE UMR 5175CNRS Université de MontpellierUniversité Paul‐ Valery MontpellierEPHE Montpellier Cedex 05 France
4. Institute of Avian Research Wilhelmshaven Germany