A rare melanistic leopard, also known as a black panther, on the prowl. This two-year-old female, called Giza by local trackers in Kenya, first appeared near the Ewaso Narok River 18 months ago. She was delivered in a litter of two cubs to a more usual spotted leopard. Melanism is the rarer opposite of albinism that occurs in humans and animals. Giza has grown accustomed to people and tolerates the occasional vehicle following her through her territory. She is thought to be the first black leopard in Africa to have been photographed without the use of camera traps…