The five species of rhinoceros are the white rhino (which is the largest species of rhino) and the black rhino which are both native to Africa and are only really distinguished in size as they look fairly similar. The Indian rhino, the Sumatran rhino and the Javan rhino are all native to Asia and are much smaller in size than the white rhino and the black rhino of Africa.
The rhino is prized for its horn. The horns of a rhinoceros are made of keratin, the same type of protein that makes up hair and fingernails in most animals including humans. Both African species of rhino and the Sumatran rhinoceros have two horns, while the Indian rhino and Javan rhinoceros have just one horn. Rhinos have brilliant hearing and the rhino also has a keen sense of smell, but the rhino is well known for having extremely poor eyesight.
The rhinoceros is generally found in thick forests and savannas where there is plenty of food to eat and lots of cover for the rhino to hide in. Although the rhino is a herbivore, they are known for their aggressive nature and will often charge towards oncoming predators in order to scare them away. Most rhinoceros individuals that are killed by poachers, are caught out when they are quietly drinking from a water hole and therefore drop their guard.