Blue wildebeest
This species of wildebeest seems to have evolved around 2.5 million years ago. The black wildebeest is believed to have diverged from the blue wildebeest to become a distinct species around a million years ago, in the mid- to late Pleistocene. Fossil evidence suggests that blue wildebeest were quite common in the Cradle of Humankind in the past. Apart from eastern Africa, fossils are commonly found in Elandsfontein, Cornelia, and Florisbad.
Frank Church–River of No Return Wilderness
Because of its size the wilderness area provides a secluded habitat for a wide variety of mammal species, including some rare, vulnerable species. The wilderness is inhabited by a large population of mountain lions and grey wolves. Populations of black bears, as well as: lynx, coyote, and red fox are scattered throughout the area. Other observable ruminant wildlife within the wilderness include: bighorn sheep, mountain goats, elk, moose, mule deer, and white tail deer. While this area has been deemed as one of the few remaining areas in the contiguous states with suitable habitat for grizzly bears, no established populations are known to exist. The wilderness also offers some of the most critical habitat for wolverines in the lower 48 states. Beavers that were parachuted into the area from Idaho (in 1948) have established a healthy colony here.