Bull frog can get up to be as big as a large dinner plate and they have long legs and webbed feet with circles for ears. Toads are short legged and have warts all over them and release a toxin when touched or disturbed. Toxin is harmless in reality, it just keeps things from eating it up because it taste bad. A leopard frog is much smaller than bullfrog and has leopard like pattern. They are also one of the most slippery frogs and are hard to grasp.