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.
American black swift
The American black swift, or more simply black swift ("Cypseloides niger"), is a name given to birds that are found from northern British Columbia in Canada through the United States and Mexico to Costa Rica and Brazil. They are also found on islands in the West Indies.