The Cougar is the 4th largest cat in the world along with the Leopard, after the Tiger, the Lion, and the Jaguar. However, Cougars are basically House Cats on steroids. It is known by more names than any other animal. It can be called a Puma, a Mountain Lion, a Catamount, and a Panther, just to name a few. The Panther name comes from the endangered Florida Panther.