The black rhinoceros is a species of rhino that is native to eastern and central Africa, including Kenya, Tanzania, Cameroon, South Africa, Namibia, Zimbabwe, and Angola. For most of the 20th century, the black rhino was the most numerous of all rhino species. Around 1900, there were estimated to be several hundred thousand living in Africa. This number then shrunk to 70,000 in the late 60s to a meager 10,000 rhinos by 1981. By the early 90s, the number dipped to 2,500 rhinos, and in 2004 it was reported that only 2,410 black rhinos were left in the wild. Three subspecies, including the western black rhino, were declared extinct by 2011.