Black wildebeest
The black wildebeest or white-tailed gnu ("Connochaetes gnou") is one of the two closely related wildebeest species. It is a member of the genus "Connochaetes" and family Bovidae. It was first described in 1780 by Eberhard August Wilhelm von Zimmermann. The black wildebeest is typically in head-and-body length, and the typical weight is . Males stand about at the shoulder, while the height of the females is . The black wildebeest is characterised by its white, long, horse-like tail. It also has a dark brown to black coat and long, dark-coloured hair between its forelegs and under its belly.
Great Plains wolf
The Great Plains wolf's distribution once extended throughout the Great Plains from southern Manitoba and Saskatchewan southward to northern Texas. They are described as a large, light-colored wolf but with black and white varying between individual wolves, with some all white or all black. The body length is with a weight of the male averaging and the heaviest recorded at . The Indians of North Dakota told of how only three of these wolves could bring down a buffalo, include a large old bull.