Game Warden and the Duck Hunter

This guy is duck hunting in North Texas. He had killed only one mallard and was packing up when the game warden arrived on the scene. The game warden checked his shotgun and shells and asked him to see his license. The man produces his Texas license and the game warden checks it. All was in order. The guy starts to walk away. Game warden says hold on a minute and sticks his finger in the ducks butt. He sniffs it. He tastes it. He say this duck came from Oklahoma. Do you have an Oklahoma hunting license. The guy says yeah and hands it to him. Guy starts to walk away again. Game warden says hold on a minute. Sticks his finger in the ducks butt a little deeper. Sniffs it. Tastes it, and says this duck came from Kansas. Do you have a Kansas license. Guy says yeah and hands it to him. All is in order. Game warden is getting a little peeved now and asks the guy where he is from. Guy bends over and drops his pants. Says you tell me.