A black panther is typically a melanistic color variant of any Panthera species. Black panthers in Asia and Africa are leopards (Panthera pardus). Black panthers in the Americas are black jaguars (Panthera onca).
A tiny lion cub and two lionesses take a walk in the Masai Mara, Kenya. Acccording to the photographer this cub was the smallest of its siblings and always stayed close to the lionesses. Photo by David Lazar.