OK time to get technical. look for the peratoid glands (those big kidney shaped warts on its shoulders).now took behind its eyes. you should see two ridges in an "L" shape.these are the cranial ridges or crests. if the canial ridges are toching the peratoid glands, it is likely an american toad(B. americanus) if not, it is a fowlers toad(B. fowliri).