25x Postcard of Exotic Wildlife (Big Cats) The big cats are some of the most beautiful and magnificent animals on our planet! Big cat distinguishes large cat species from smaller ones. Members of the genus Panthera are the only cats able to roar, and this is sometimes considered a distinguishing characteristic of big cats. Despite enormous differences in size, the various species of cat are amazingly similar in both structure and behavior. All cats are carnivores and efficient predators. Photographers - Barbara von Hoffmann and Ron Kimball/Kimball Stock Photography Postcard size 4 x 6