1. Specialist Conservation Officer, The Endangered Wildlife Trust, Loxton, Northern Cape, South Africa; e-mail: estherm@ewt.org.za
2. Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa; e-mail: ruhan.verster@gmail.com
3. Professor in Zoology, North-West University, Potchefstroom, South Africa; e-mail: che.weldon@nwu.ac.za