1. Department of Anthropology, University of California at Davis, Davis, CA, USA
2. Department for the Ecology of Animal Societies, Max Planck Institute of Animal Behavior, Radolfzell, Germany
3. Department of Biology, University of Konstanz, Konstanz, Germany
4. Centre for the Advanced Study of Collective Behaviour, University of Konstanz, Konstanz, Germany
5. Department of Entomology, University of California at Davis, Davis, CA, USA
6. Department of Environmental Science and Policy, University of California at Davis, Davis, CA, USA