Received: 28 May 2019
Accepted: 18 December 2019
First Online: 21 January 2020
: Animal ethics approval was granted for the research by the Tshwane University of Technology Animal Research Ethics Committee, reference number AREC2016/05/002. Specimens were collected under Ezemvelo KwaZulu-Natal Wildlife permit number OP 5470/2014.
: The authors declare that they have no competing interests.