The lowest point in Kruger is where the Sabie River cuts through the Lebombo (120m) range and enters Mozambique. The south-east is hot and dry, with less rainfall (300mm pa) than the Park average (650mm pa). Malaria is a concern during summer.
Rhinos and crocodiles go back a long time. A common ancestor to the rhinos one sees today has been traced back to 50 million years ago. African rhinos evolved from the Asian lineage approximately 10 million years ago.
The black rhino (Diceros bicornis) is more primitive than the white rhino (Ceratotherium simum), which separated ancestral pathways approximately four to 5 million years ago. Rhinos have passed their evolutionary peak and survive only in protected areas.
The crocodile has a much older ancestry. Its origins lie in the archaesaurs approximately 200 million years ago. Crocodiles, in their present evolutionary state, survived the mass extinction of the dinosaurs 65 million years ago.