Black wildebeest
Where it lives alongside the blue wildebeest, the two species can hybridise, and this is regarded as a potential threat to the maintenance of the species. The black wildebeest was once very numerous and was present in Southern Africa in vast herds, but by the end of the 19th century, it had nearly been hunted to extinction and fewer than 600 animals remained. A small number of individuals was still present in game reserves and at zoos, and from these, the population was rescued.
Black mongoose
The black mongoose ("Galerella nigrata") is a species of mongoose found in Namibia and Angola. Although originally described as a separate species by Thomas (1928), it was often been considered a subspecies of the slender mongoose. However, genetic analysis has confirmed its status as a separate species. Evidence suggests the two species diverged around four million years ago, likely due to some populations becoming separated as the habitat in southern Africa was changing. The black mongoose now occupies a distinct habitat in areas with large boulders and rocky outcrops known as inselbergs in the mountainous regions of northwest Namibia and southwest Angola. After remaining in these areas for millions of years, the black mongoose is highly specialized to survive in the harsh arid environment.