Unfortunately, I did not have the latest data prepared as GIS layers, so this is for the year 2000. This will be the sort of exercise you might be expected to do in your eco/geo-informatics programme: getting the latest biodiversity data from the IUCN Red Data list, prepare the data as a GIS layer and present it as cartograms. You will be expected to discuss your results and to post your article on the Weblog for general discussion, complete with a reference list.
The cartograms have scaled each country's size to the value of the variable (e.g. number of threatened fish species). Further the maps are thematically shaded with red indicating the highest value of threatened or endangered status going through orange, yellow, light green to dark green which represents the lowest values.
As you can see South Africa is a Biodiverse region that has high risks of extinction, especially for plant species.
Gastner, MT and Newman, MEJ 2004. Diffusion-based method for producing density-equalizing maps. Proc. Natl. Acad. Sci. USA 101, 7499-7504.