1. Centre for Invasion Biology, Department of Conservation Ecology and Entomology Stellenbosch University Private Bag X1 Matieland 7602 South Africa
2. South African Sugarcane Research Institute Private Bag X02 Mount Edgecombe 4300 South Africa
3. UP Stable Isotope Laboratory, Mammal Research Institute University of Pretoria Hatfield 0028 Pretoria South Africa