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Physical description
The black rhinoceros has two horns, and occasionally a third small posterior horn. The anterior horn is longer than the posterior, averaging 50cm long. 
The species isdistinguished from the white rhino by a prehensile upper lip, which it uses to feed on twigs of woody plants and a variety of herbaceous plants.
Size: 800-1,400 kg.
Colour: Dark yellow brown to dark brownor dark gray.
habitat
Black rhinos are mainly found in grassland-forest transition zones, but are present in habitats ranging from desert in south-western Africa to montane forests in Kenya. 
Thespecies is usually restricted to areas within about 25km of water sources. Black rhinos can often be found in mud or water wallows, where they cool themselves.
Grasslands,deserts and montane forestWhat are they endangered?
Hunting
European hunters were responsible for early declines. Finding rhinos easy prey, there are common accounts of killing five or six in a day, to be eaten or simply foramusement.

European settlers, arriving in the early 20th century to colonize and establish farms and plantations, continued this senseless slaughter: most regarded rhinos as vermin, to beexterminated at all costs.

Poaching
Poaching of African rhinos for their horns escalated from the 1970s, and remains the greatest threat to black rhinos.
Political instability and wars have greatlyhampered rhino conservation work in Africa, notably in Angola, Rwanda, Somalia and Sudan. This situation has exacerbated threats such as trade in rhino horn, and increased poaching due to poverty. Habitat loss
Habitat changes have also contributed to population declines, although this is a secondary threat after poaching.
In southern Zimbabwe, privately owned rhino conservancies have been invadedby landless people, reducing safe habitat for two large black rhino populations and increasing the risk of poaching and snaring

How we can help?
Wwf or experts can do more habitats apart from...