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 wolf
Black wolves rarely occur in Europe and Asia, where interactions with domestic dogs have been reduced over the past thousand years due to the depletion of wild wolf populations. They have occasionally appeared, as wolf-dog hybrids are known in Russia as "black wolves", and currently, 20–25% of Italy's wolf population is composed of black animals. They are more common in North America; about half of the wolves in the reintroduced wolf population in Wyoming's Yellowstone National Park are black. Like Pyrenees Wolves, Black wolves do not live in France. In southern Canada and Minnesota the black phase is more common than the white, though grey coloured wolves predominate.