Source: © Wardell-Johnson, Grant. 2000. Biodiversity and Conservation on Namibia into the 21st Century. Pages 17-45 in B. Fuller and I. Prommer, Population-Development-Environment in Namibia: Background Readings. Laxenburg, Austria: IIASA, IR-00-031.

After
Jarvis, A. and A. Robertson. 1997. Endemic Birds of Namibia. Evaluating Their Status and Mapping Biodiversity Hotspots. Research Discussion Paper No 14. Windhoek: Directorate of Environmental Affairs, Ministry of Environment and Tourism.
and
Curtis, B., K. Roberts, M. Griffin, S. Bethune, C.J. Hay, and H. Kolberg. 1998. Species richness and conservation of Namibian freshwater macro-invertebrates, fish and amphibians. Biodiversity and Conservation 7:447-466.