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 tarsier well beyond what may be detected by the human ear and is a distinct advantage to keeping their communication species-specific. Tarsiers, in general, are insectivorous, and tarsiers are the only primates that are completely carnivorous. As insectivores, they also play an integral role in their habitat in structuring the insect community and in the local food webs. Pygmy tarsier The pygmy tarsier ("Tarsius pumilus"), also known as the mountain tarsier or the lesser spectral tarsier, is a nocturnal primate found in central Sulawesi, Indonesia, in an area with lower vegetative species diversity than the lowland tropical forests. The pygmy tarsier