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
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