Pygmy hippopotamus population that freely breeds in zoos around the world. Between 1970 and 1991 the population of pygmy hippos born in captivity more than doubled. The survival of the species in zoos is more certain than the survival of the species in the wild. In captivity, the pygmy hippo lives from 42 to 55 years, longer than in the wild. Since 1919, only 41 percent of pygmy hippos born in zoos have been male. While the common hippopotamus was known to Europeans since classical antiquity, the pygmy hippopotamus was unknown outside its range in West Africa until the 19th century. Due
Pygmy possum species are able to leap long distances. Conservation International (CI) and the Indonesia Institute of Science (LIPI) reported on the possible discovery of a new species of "Cercartetus" pygmy possum upon visit to the Foja Mountains in June 2007. The two genera of pygmy possums are "Burramys" and "Cercartetus". "Burramys" contains only one extant species, the mountain pygmy possum, "B. parvus". As currently understood, "Cercartetus" consists of four extant species. † = extinct species Pygmy possum The pygmy possums are a family of small possums that together form the marsupial family Burramyidae. The five extant species of pygmy possum are