Rhinoceroses
Afrikaans name : Renoster 
Scientific name : Order : perissodactyl - 
African black rhino ( Diceros bicornis ) 
African white or square-lipped rhinoceros (Ceratotherium simum)

Region : Native to Eastern and southern Africa and Tropical Asia. White Rhino is found almost exclusively in Eastern South Africa.
Description : The terms black and white may sound misleading, since both species are grayish to brownish, but white comes from 'wide' as is the lip of the 'wide rhino'. Enormous animals, There are two subspecies of white rhino, the  Northern white rhino, Ceratotherium simum cottonien (endangered), and the Southern white rhino, Ceratotherium simum simum.They are gentle giant and the biggest land mammal after elephants (though outweighed by hippo).
Habitat : The black rhinoceros occupies a variety of habitats, frequenting open plains, sparse thorn scrub, savannas, thickets, and dry forests, as well as mountain forests and moorlands at high altitudes.
Weight : max. 1400 kg. (black) 2250 kg. (white)
Lenght : 2.5 m 
Height : 160 cm at the shoulder (black). 185 cm (white)
Speed : top speed 45 km/h
Horns : rhinoceros horn are valued as an aphrodisiac. They have two Keratin fiber horns, unique to the rhinoceros,  with the front one thinner and longer than the rear one. Length - up to 80 cm.
Food :  The black rhino is a selective browser, and grass plays a minor role in its diet. Succulent plants, such as euphorbias, assume great importance in dry habitats, and where these plants are abundant the animals appear to be able to survive without free water. 
The much larger white rhinoceros is a grazing species with a broad, square muzzle. It prefers short grasses seven to 10 centimetres high. Perhaps the largest pure grazer that ever lived, the white rhino uses its wide mouth and muscular lips to graze a broad swath, feeding most efficiently in dense swards of short, green grass.
Habits : Rhinoceroses have poor eyesight but acute senses of hearing and smell, it's primary method of detecting danger.
Young : Cows seek dense cover before calving. Gestation period 15 months. Calves can stand 10 minutes after being born and begin to follow their mothers right away. There is a strong bond between mother & most recent young, who stay with mother for 1/2 yrs.
Predators : Hyena, Lion, sometimes manage to prey on young.

All but the black rhinoceros are listed as endangered in the Red Data Book