African rhinos have two horns.
The Sumatran rhino has two horns.
The Indian rhino has one horn.
The rare Javan rhino from Indonesia has one horn.
Rhinoceros means ‘nose horn’ but the word is usually shortened to rhino, which means nose.
The horns are made of a protein called keratin. Human hair and fingernails are also made of keratin.
Some park rangers remove the main horn to stop poachers killing rhinos for the horn.
Photographer: Martina Nicolls
Martina Nicolls: SIMILAR BUT DIFFERENT IN THE ANIMAL KINGDOM