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
Japanese pygmy woodpecker three weeks. The species has a large range and a stable population, so the IUCN has assessed it as a least-concern species. Japanese pygmy woodpecker The Japanese pygmy woodpecker or pygmy woodpecker ("Yungipicus kizuki") is a species of woodpecker. It is found in coniferous and deciduous forests in Russia, China, North Korea, South Korea and Japan. This species has also been placed in the genus "Dendrocopos" or "Picoides". The International Union for Conservation of Nature (IUCN) has assessed it as a least-concern species. This species was described by Temminck in 1836. The IOC World Bird List recognizes the following subspecies: