In general, TOADs are squatty and plumpy creatures with a rough warty skin and poison glands. It is probably the most widely introduced amphibian in the world. Frogs usually have a smooth, moist skin and spend most of their lives in or near water.
TOADs usually have a dry, warty-looking skin and spend more time living on land.
Scientifically, things are more complicated. The lifespan of a TOAD is generally between 4 and 15 years. This is why you sometimes find sluggish-acting TOADs on cool mornings in the spring. Frogs' bodies have some natural antifreeze built into them, but some kinds of frogs who live in especially cold climates can even survive being frozen solid. It not only tastes bad, but also irritates the mouth of any predators who try to eat TOADs, and can cause convulsions or even death.