1. Department of Psychology, Neuroscience and Behaviour McMaster University Hamilton Ontario L8S 4M4 Canada
2. Department of Behavioural Ecology Bielefeld University Konsequenz 45 Bielefeld 33615 Germany
3. School of Biological Sciences Life Sciences Building, 24 Tyndall Avenue Bristol BS8 1TQ U.K.
4. Milner Centre for Evolution, Department of Biology and Biochemistry University of Bath Bath BA2 7AY U.K.
5. Department of Evolutionary Zoology and Human Biology University of Debrecen Egyetem ter 1 Debrecen H‐4032 Hungary
6. Department of Biology University of Western Ontario 1151 Richmond Street North London Ontario N6A 5B7 Canada