There’s no exact identification of what a big cat is. Some people believe only cats that roar can be big cats. Those cats are the tiger, lion, jaguar, and leopard. Others say that all wild, undomesticated cats are big cat breeds. That classification would include all the wild cats on this list, even the tiny sand cat. As the facts about wild cats show, they all share similar traits. They are carnivores and excellent predators who dominate their environment.