The black rhinoceros (Diceros bicornis) is the most well known of the five living rhinoceros species, with its aggressive reputation and highly publicised international conservation drive. Black rhinoceros are in fact grey in colour and are distinguished from the other African species (which is also grey) the white rhinoceros (Ceratotherium simum), by its pointed, prehensile upper lip; white rhinoceros have square lips. Both African rhinoceros species possess two horns, made from clumped fibres rather than bone, and the taller front horn may be 60 centimetres or longer. It is estimated that 96 % of the black rhino population was lost between 1970 and 1992. The black rhino has a characteristic pointed, prehensile upper lip, which is adapted for grasping leaves and twigs.
