Rhinos are one of the oldest groups of mammals. Black rhinos have two horns and a pointed upper lip which they use to feed on the leaves and twigs of woody plants and herbs. Foraging often occurs in the cool of dawn and dusk. They spend much of the rest of the day resting in the shade or wallowing in water holes, coating their skin in mud to protect it from the sun and biting flies. They are solitary.
Once found throughout much of sub-Saharan African, black rhinos have been poached to the brink of extinction due to the demand for their horn, both for use in Chinese traditional medicine and for traditional dagger handles in Yemen. It is estimated that between 1970 and 1992, around 96 percent of the black rhinoceros population was lost. Today there are a few fragmented populations in reserves in Kenya, Tanzania, Namibia, Zimbabwe, South Africa, Cameroon, Malawi and Swaziland.