1. Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria 0110, South Africa
2. Department of Agriculture, Western Cape Government, Elsenburg 7607, South Africa
3. CapeNature, Cape Town 7766, South Africa
4. Department of Biodiversity & Conservation Biology, University of the Western Cape, Bellville 7535, South Africa
5. Southern African Foundation for the Conservation of Coastal Birds (SANCCOB), Cape Town 7441, South Africa
6. Department of Biological Sciences, University of Cape Town, Rondebosch 7701, South Africa
7. Cape Research Centre, South African National Parks, Tokai 7966, South Africa
8. South African Institute for Aquatic Biodiversity, Grahamstown 6140, South Africa
9. Republic of South Africa Department of Forestry, Fisheries and the Environment, Cape Town 8001, South Africa
10. FitzPatrick Institute of African Ornithology, University of Cape Town, Rondebosch 7701, South Africa
11. Aberystwyth School of Veterinary Science, Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth SY23 3DA, UK