1. Department of Collective Behavior, Max Planck Institute of Animal Behavior, Konstanz, Germany
2. Centre for the Advanced Study of Collective Behaviour, University of Konstanz, Konstanz, Germany
3. School of Biological Sciences, University of Nebraska Lincoln, Lincoln, NE, USA
4. Department of Psychology, University of Texas at Austin, Austin, TX, USA
5. Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, USA