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
Kozlov's pygmy jerboa Kozlov's pygmy jerboa Kozlov's pygmy jerboa ("Salpingotus kozlovi") is a species of rodent in the family Dipodidae. It is found in northwestern China and southern and eastern Mongolia. Its natural habitat is temperate desert. Kozlov's pygmy jerboa is a very small rodent with a relatively large head and a very long tail; it has a head-and-body length of and a tail length of and its weight is between . The fur is silky, the upper parts are sandy-grey with the bases of the hairs yellowish-grey, the flanks are rather paler and the underparts white or yellowish. The hind feet have