Ornate Horned Frog (Ceratophrys ornata)
Horned frogs have voracious appetites, but they are not built for chasing down prey. They bury themselves in leaves or loose soil and pounce on small animals that blunder by. When harassed by a human or other large animal, these fearless frogs lunge and snap their huge jaws. Like little green bulldogs, they bite and hang on until pried loose.