1. Department of Collective Behaviour, Max Planck Institute of Animal Behavior, Universitätsstraße 10, 78464, Konstanz, Germany
2. Centre for the Advanced Study of Collective Behaviour, University of Konstanz, Universitätsstraße 10, 78464, Konstanz, Germany
3. Department of Biology, University of Konstanz, Universitätsstraße 10, 78464, Konstanz, Germany