Big cat
The terms big cat and great cat, while not a biological classification, are used informally to distinguish the larger felid species from smaller ones. A narrower definition of includes five members of the genus Panthera: the tiger, lion, jaguar, leopard, and snow leopard. Only members of this genus are able to roar. A more expansive definition additionally includes the cougar and cheetah. Another cat, the leopard is considered an evolutionary link between big and small cats.
Threats
The principal threats to big cats vary by geographic location, but primarily are habitat destruction and poaching. In Africa many big cats are hunted by pastoral or government 'problem animal control' officers. Over the past few months Problem Animal Control (PAC) lion hunts in Zimbabwe have been offered to American hunters, even though according to Zimbabwe National Parks there are no such hunts currently available. Certain protected areas exist that shelter large and exceptionally visible populations of lions, hyenas, leopards, and cheetahs, such as Botswana's Chose, Kenya's Masai Mara, and Tanzania's Serengeti. Rather, it is outside these conservation areas where hunting poses the dominant threat to large carnivores.