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
Mountain pygmy possum offer some protection from predation. "Burramys parvus" is noted to be the only small mammal in Australia that hibernates seasonally for long periods of time. All other members of "Burramyidae" are capable of opportunistic hibernation. Adult mountain pygmy possums enter hibernation for a period of up to seven months, whereas juveniles generally hibernate for about five months. Both males and females rely heavily on Bogong moths as an energy rich food and for the fattening period which occurs prior to hibernation. Mountain pygmy possums are also noted to cache seeds and berries which they will feed on during periods when