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
Pygmy slow loris wildlife status report of 1999 describes the species as "little known" and "common", based on availability of potential habitat. In 2000 the IUCN classified the pygmy slow loris as "Vulnerable", as did the Vietnam Red Data Book the same year. The European Union (EU) (2005) describes the population status in Laos as "apparently widespread, but not common anywhere". In addition to habitat destruction, the pygmy slow loris is seriously threatened by hunting and trade. Within its geographic range and neighbor countries, the trade in the pygmy slow loris has recently increased due to economic changes and human population growth, and