Although Big Cat is not a biological classification, it is generally used to classify the difference between cats such as those kept in homes and those that live in the wild and tend to be much larger and more interesting. These include the Lion, Tiger, Leopard, Jaguar, Cheetah, Cougar, Snow Leopard, and the Clouded leopard. All of them are carnivores and efficient hunters, but many are endangered due to habitat destruction and poaching.