The Fowler's Toad vs. the Eastern American Toad
I have made a quick guide for differentiating between Fowler's Toads and American Toads, something I find quite difficult. I hope it helps.
Sources:
Frog Species in Massachusetts. Retrieved October 17, 2019, from https://www.massaudubon.org/learn/nature-wildlife/reptiles-amphibians/frogs/frog-species-in-massachusetts
Hankey, J., & Hamilton, B. Fowler's Toad. Retrieved October 17, 2019, from https://www.paherps.com/herps/frogs-toads/fowlers_toad/
Frog Identification Keys - Anaxyrus formerly Bufo (Toads). Retrieved October 17, 2019, from https://www.virginiaherpetologicalsociety.com/identification-keys/id-keys-frogs/anaxyrus-bufo.html