Fowler's Toads are often rather precisely marked with 3 pairs of dorsal spots.
By Dick and Patti Bartlett

Fowler’s Toad, Bufo fowleri, ranges widely in sandy habitats from central New England to southeastern Iowa, eastern Texas and the panhandle of Florida. It is one of the more precisely marked toad species. In some parts of its range it may be the dominant species, in other it is a comparative rarity. Where I (Dick) grew up in central New England, Fowler’s Toad was abundant but always 2nd in a lineup of 2. The American Toads would arrive first at the breeding ponds to voice their slow-pulsed melodious trills. Then a couple of weeks later, when many American toads had already left the calling sites, the rapidly pulsed, very non-melodious, “whirring notes” of Fowler’s Toads, back then a subspecies of Woodhouse’s , could be heard. Occasionally we would hear a vocalization that confused us and when we tracked it down it would be as intermediate between the 2 species in appearance as it was in voice—a hybrid between the 2. Mother Nature at work.