We all know pigs are pigs. But are they really the worst gluttons on earth? There are other animals that are so greedy they put the pig to shame — The Tiger Shark has been found with a vast array of things in it's stomach — seems like it will eat just about anything. The Tasmanian Devil can swallow up to 40 percent of its body weight in only 30 minutes — that would be like a human devouring 216 hamburgers during a half-hour lunch break. Seems like a pig isn't such a pig after all and this countdown reveals the greediest of them all.