Black wildebeest
Black wildebeest act as hosts to a number of external and internal parasites. A study of the animal in Karroid Mountainveld (Eastern Cape Province, South Africa) revealed the presence of all the larval stages of the nasal bot flies "Oestrus variolosus" and "Gedoelstia hässleri". The first instar larvae of "G. hässleri" were found in large numbers on the dura mater of wildebeest calves, specially between June and August, and these later migrated to the nasal passages. Repeated outbreaks of mange (scab) have led to large-scale extinctions. The first study of the protozoa in blue and black wildebeest showed the presence of 23 protozoan species in the rumen, with "Diplodinium bubalidis" and "Ostracodinium damaliscus" common in all the animals.
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.