The wildcat was a great, yellow and unfriendly beast that freely roamed the magical Land of Oz. It had ugly, yellow teeth and red eyes like balls of fire.
In order to rescue the Queen of the Field Mice, the Tin Woodman chopped off the wildcat's head while it was chasing her. To thank him, she and her mouse subjects helped him and the Scarecrow rescue the Cowardly Lion from the deadly field of Poppies. (The Wonderful Wizard of Oz)