Sudan is one of a handful of northern white rhinos left worldwide . The animals are protected by the Convention on International Trade in Endangered Species (CITES) and have been listed as endangered since 2000. Experts are trying various ways , including in vitro fertilization .
Sudan is one of a handful of northern white rhinos left worldwide . As the only male , the fate of the subspecies rests on his ability to conceive with two females at a conservancy . Experts are trying various ways , including in vitro fertilization .