Pygmy hippopotamus boar; unlike those of the common hippo, the pygmy hippo's teeth have no value. The effects of West Africa's civil strife on the pygmy hippopotamus are unknown, but unlikely to be positive. The pygmy hippopotamus can be killed by leopards, pythons and crocodiles. How often this occurs is unknown. "C. liberiensis" was identified as one of the top-10 "focal species" in 2007 by the Evolutionarily Distinct and Globally Endangered (EDGE) project. Some populations inhabit protected areas, such as the Gola Forest Reserve in Sierra Leone. Basel Zoo in Switzerland holds the international studbook and coordinates the entire captive pygmy hippo
Mountain pygmy possum is hairless. On the underside of the female's body is a pouch containing four teats. This possum is the only extant species in the genus "Burramys". It is also the only Australian mammal restricted to alpine habitat. The mountain pygmy possum was first discovered in the fossil record in 1895 when a portion of the jaw and skull bones were found in the Wombeyan Caves in central New South Wales. At the time, the species was believed to be extinct. It was not until 1966 that a living individual was found at a ski resort at Mount Hotham in Victoria.