Five critically endangered black rhinos are being transferred from captivity in Europe to a nature reserve in Rwanda. The animals are being flown 6,000 kilometres as part of the biggest ever transportation of rhinos from Europe to Africa, following years of preparations. Less than 5,000 wild black rhinos and only 1,000 eastern black rhinos are left in Africa, and they remain under threat from poaching. Three female and two male black rhinos, aged between two and nine, were chosen for the move to Akagera National Park. All five were born and bred in Europe and have been in captivity for their whole lives. Image: Getty