It is hoped releasing the rhino will see the population rise

Kivu and Tana, who were bred at Port Lympne Wild Animal Park near Hythe, arrived in South Africa on Monday.

The pair travelled to Johannesburg by plane before being driven to a game reserve, which cannot be identified for fear of poachers targeting the rhinos.

It is only the second time black rhinos bred in England have been sent back to their native land.

The move is an attempt to boost the black rhino population.

At the moment there are only about 2,000 to 3,000 left in the world - a number which is hoped will increase to about 6,000 in about four years.

The game reserve has a double-electrified fence all the way around to prevent poachers from getting in.