1. Cognitive and Cultural Ecology Research Group Max Planck Institute of Animal Behavior Radolfzell Germany
2. Australian Museum Research Institute Sydney New South Wales Australia
3. School of Life and Environmental Sciences The University of Sydney Camperdown New South Wales Australia
4. Institute of Science and Learning, Taronga Conservation Society Australia Mosman New South Wales Australia
5. Centre for the Advanced Study of Collective Behaviour University of Konstanz Constance Germany
6. Division of Ecology and Evolution, Research School of Biology The Australian National University Canberra Australian Capital Territory Australia