1. Université de Lorraine, AgroParisTech, INRA, UMR Silva, Nancy, France
2. UMR PIAF, INRA, Université Clermont Auvergne, Aubière, France
3. Department of Collective Behaviour, Max Planck Institute for Ornithology, University of Konstanz, Konstanz, Germany
4. UMR Biopolymers, Interactions and Assemblies, INRA, Nantes, France