Pygmy hippopotamus occur. The common hippopotamus gives birth and mates only in the water, but pygmy hippos mate and give birth on both land and water. Young pygmy hippos can swim almost immediately. At birth, pygmy hippos weigh 4.5–6.2 kg (9.9–13.7 lb) with males weighing about 0.25 kg (0.55 lb) more than females. Pygmy hippos are fully weaned between six and eight months of age; before weaning they do not accompany their mother when she leaves the water to forage, but instead hide in the water by themselves. The mother returns to the hiding spot about three times a day and calls
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: