1. School of Life Sciences, University of Kwazulu-Natal, Private Bag X01, Scottsville 3209, South Africa
2. Bring the Elephant Home Foundation, 3132 VB Vlaardingen, The Netherlands
3. The Elephant Path, 3012 GR Rotterdam, The Netherlands
4. Applied Behavioural Ecology and Ecosystem Research Unit, Florida Campus, University of South Africa, Johannesburg 1710, South Africa
5. Department of Philosophy, Faculty of Humanities, University of Johannesburg, Auckland Park 2006, South Africa
6. Elephants Alive, Hoedspruit 1380, South Africa
7. School of Built Environment and Development Studies, Howard College, University of Kwazulu-Natal, Durban 4041, South Africa
8. Department of Genetics, Evolution & Environment, University College London, Darwin Building, Gower Street, London WC1E 6BT, UK