Eldest of world’s last two northern white rhinos retired from breeding programme

Retirement of Najin, 32, leaves her daughter Fatu as the only egg donor in embryo implantation scheme

One of the world's last two northern white rhinos is being retired from a breeding programme aimed at saving the species from extinction.

Najin, 32, is the mother of Fatu, who is now the only donor left in the programme, which aims to implant artificially developed embryos into another more abundant species of rhino in Kenya.