1. Department for the Ecology of Animal Societies Max Planck Institute for Animal Behavior Constance Germany
2. Department of Biology University of Konstanz Constance Germany
3. International Max Planck Research School for Quantitative Behavioral Ecology and Evolution Max Planck Institute for Animal Behavior, University of Konstanz Constance Germany
4. Center for the Advanced Study of Collective Behavior University of Konstanz Constance Germany
5. Department of Human Behavior, Ecology, and Culture Max Planck Institute of Evolutionary Anthropology Leipzig Germany
6. Department of Anthropology University of California‐Los Angeles Los Angeles California USA