1. Okavango Research Institute, University of Botswana, Okavango Research Institute, Maun, Botswana
2. Department of Range and Forest Resources, Botswana University of Agriculture and Natural Resources, Gaborone, Botswana
3. Plants and People Africa, London, UK
4. Department of Biological Sciences, University of Botswana, Gaborone, Botswana
5. Department of Wildlife and National Parks, Ministry of Environment, Natural Resources, Conservation and Tourism, Maun, Botswana