About the Authors

Hanlie E. K. Winterbach

tauconsultants@gmail.com

Affiliations Tau Consultants (Pty) Ltd, Maun, Botswana, Centre for Wildlife Management, University of Pretoria, Pretoria, South Africa

Christiaan W. Winterbach

Affiliations Tau Consultants (Pty) Ltd, Maun, Botswana, Centre for Wildlife Management, University of Pretoria, Pretoria, South Africa

Michael J. Somers

Affiliations Centre for Wildlife Management, University of Pretoria, Pretoria, South Africa, Centre for Invasion Biology, University of Pretoria, Pretoria, South Africa

Competing Interests

The authors have the following interests: This study was funded in part by Tau Consultants (Pty) Ltd. H.E.K. Winterbach and C.W. Winterbach are directors and sole shareholders of Tau Consultants (Pty) Ltd, which is registered as an independent research company in Botswana. There are no patents, products in development or marketed products to declare. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: HEKW CWW. Performed the experiments: HEKW CWW. Analyzed the data: HEKW CWW. Wrote the paper: HEKW. Revised it critically for important intellectual content: MJS.