1. MacArthur Green, 95 South Woodside Road, Glasgow, UK
2. College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
3. Department of Life and Environmental Sciences, University of Iceland, 101 Reykjavík, Iceland
4. Southwest Iceland Nature Research Centre, Gardvegi 1, 245 Sandgerdi, Iceland
5. Psychology Department, Memorial University of Newfoundland, St John’s, NF A1B 3X9, Canada
6. Wildlife Research Division, Environment Canada, 6 Bruce Street, Mount Pearl, NL A1N 4T3, Canada
7. Research and Technology Centre (FTZ), University of Kiel, Hafentörn 1, 25761 Büsum, Germany
8. Department of Animal Ecology and Conservation, Biocentre Grindel, Hamburg University, Martin-Luther-King Platz 3, 20146 Hamburg, Germany