The leopard Panthera pardus, is a member of the Felidae family and the smallest of the four "big cats" in the genus Panthera, the other three being the tiger, lion and jaguar. Once distributed across eastern and southern Asia and Africa, from Siberia to South Africa, the leopard's range of distribution has decreased radically because of hunting and loss of habitat. It is now chiefly found in sub-Saharan Africa; there are also fragmented populations in Pakistan, India, Sri Lanka, Indochina, Malaysia, and China. Because of its declining range and population, it is listed as a "Near Threatened" species by the IUCN.
Compared to other members of the Felidae family, the leopard has relatively short legs and a long body with a large skull. It is similar in appearance to the jaguar, but is smaller and more slightly built. Its fur is marked with rosettes similar to those of the jaguar, but the leopard's rosettes are smaller and more densely packed, and do not usually have central spots as the jaguars do. Both leopards and jaguars that are melanistic (completely black or very dark) are known as black panthers.
The species' success in the wild is in part due to its opportunistic hunting behavior, its adaptability to habitats, its ability to run at speeds approaching 58 kilometres per hour (36 mph), its unequaled ability to climb trees even when carrying a heavy carcass, and its notorious ability for stealth. The leopard consumes virtually any animal it can hunt down and catch. Its habitat ranges from rainforest to desert terrains.