Is this a Fowler's Toad?

I came across this little guy while walking at the Flat Rock Wildlife Sanctuary in Fitchburg, Mass., not too long ago. He was quite small, maybe an inch long at most, fairly light brown.

Looking at the markings, he seems to be a Fowler’s toad, a bit less common than the American toad, but I don’t think it’s a threatened species.

He was in dry rocky area off the old Scott Road. He was pretty well camouflaged, but a slight movement caught my eye.