1. The Safina Center, Setauket, NY 11733, USA.
2. Department of Zoology and Entomology, University of the Free State, Phuthaditjhaba, 9866, South Africa.
3. Faculty of Natural Sciences, University of Stirling, Stirling, FK9 4LA, UK.
4. Amboseli Trust for Elephants, Langata, Nairobi 00509, Kenya.
5. Wildlife Conservation Research Unit, Zoology, University of Oxford, Tubney OX13 5QL, UK.
6. Tourism Cluster, University of Queensland Business School, University of Queensland, QLD 4072, Australia.
7. School of Biological Sciences, University of Hong Kong, Pok Fu Lam, Hong Kong.
8. Department of Politics and Public Administration, University of Hong Kong, Pok Fu Lam, Hong Kong.
9. Centre for African Ecology, School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, Johannesburg, 2000, South Africa.
10. Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544-1003, USA.
11. School of Economics, University of Cape Town, Cape Town, South Africa.
12. School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK.
13. Born Free Foundation, Horsham, RH12 4QP, UK.