Pygmy hippopotamus unusual secretion as common hippos, that gives a pinkish tinge to their bodies, and is sometimes described as "blood sweat" though the secretion is neither sweat nor blood. This substance, hipposudoric acid, is believed to have antiseptic and sunscreening properties. The skin of hippos dries out quickly and cracks, which is why both species spend so much time in water. The skeleton of "C. liberiensis" is more gracile than that of the common hippopotamus, meaning their bones are proportionally thinner. The common hippo's spine is parallel with the ground; the pygmy hippo's back slopes forward, a likely adaptation to pass
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