Weighing up to two and a half tons each, rhinos aren't easy to herd, let alone pack into crates and ship across national borders in airplanes.

But that's what conservationists are doing with about a hundred rhinos in South Africa, in an admittedly desperate bid to save the endangered animals from poachers and establish new populations in the wild.

"Rhino conservation is a desperate situation, so we are moving rhinos from the highest poaching areas to the lowest poaching areas," says Dereck Joubert, a wildlife filmmaker and conservationist based in Botswana's Okavango Delta.

There are an estimated 4,000 to 5,000 black rhinos and 20,000 white rhinos left in Africa, with another one killed by poachers every seven and a half hours,