1. Department of Biological Sciences; University of Cape Town; Private Bag X1 Rondebosch 7701 South Africa
2. Organization for Tropical Studies; PO Box 33 Skukuza 1350 South Africa
3. Centre for African Ecology, School of Animal, Plant and Environmental Sciences; University of the Witwatersrand; Private Bag 3 Wits 2050 South Africa
4. Natural Resources and the Environment, Council for Scientific and Industrial Research; PO Box 395 Pretoria 0001 South Africa
5. South African Environmental Observation Network, National Research Foundation; Private Bag X7 Claremont 7735 South Africa
6. Scientific Services, SANParks; Private Bag X402 Skukuza 1350 South Africa
7. Department of Zoology; Nelson Mandela Metropolitan University; PO Box 77000 Port Elizabeth 6031 South Africa
8. Centre for Environmental Management; Faculty of Natural and Agricultural Sciences, University of the Free State; PO Box 339 Bloemfontein 9300 South Africa
9. Rangeland Ecology; Agricultural Research Council, Animal Production Institute; PO Box 7063 Nelspruit 1200 South Africa