I think the rhino crisis in South Africa (that has now spilled into Botswana and Namibia) is much more dramatic then people realise .... Kruger rhino numbers continue to fall, both for white and black rhino. It has in fact gotten so bad that when the largest rhino holder in the country has now sold off most of his stock to the African Parks organisation that will rewild white rhinos elsewhere on the African continent.
Thanks for this update. It’s interesting to know how much the Southern white rhinoceros population has fallen. I had a look and found the following population graph (it is indeed very dramatic):

Source: Kruger rhino population update - the losses continue - Africa Geographic
Poaching has been attributed as the main cause.