The Rhinoceros is the most endangered species of the Big Five due to rhino poaching and illegal trade in rhino horns. There are two species of rhino in Africa: the White Rhino and the Black Rhino and five subspecies.

The names of the rhino don't have anything to do with color as both species are grey. The name of the 'white' rhino is a corruption of the Dutch word 'wijd' (wide), which refers to the wide mouth or square lip of the white rhino. A rhino can weigh up to 5000 pounds and its horns can grow up to 5 feet long. Rhinos have poor eyesight but excellent hearing and sense of smell.