1. Centre d'Écologie Fonctionnelle et Évolutive, CNRS University of Montpellier, EPHE, IRD Montpellier Cedex 05 France
2. Institute of Avian Research Wilhelmshaven Germany
3. Applied Zoology Technical University Dresden Dresden Germany
4. Department of Biology & Institute of Integrative Biology IBZ ETH Zurich Zürich Switzerland