| Affiliation: | 1 School of Biological Sciences, University of East Anglia, Norwich, UK;2 Behavioural Ecology and Self-Organization Group, Centre for Ecological and Evolutionary Studies, University of Groningen, Groningen, The Netherlands;3 Max Planck Institute for Ornithology, Vogelwarte Radolfzell, Radolfzell, Germany;4 Department of Zoology, University of Cambridge, Cambridge, UK;5 Department of Behavioral Ecology, Institute of Ecology and Evolution, University of Bern, Hinterkappelen, Switzerland |
