Scaphiopodidae Spadefoot Toads
Species I've seen:
Scaphiopus North American Spadefoots
Scaphiopus couchii
Couch’s Spadefoot
Spea Western Spadefoots
Spea bombifrons
Plains Spadefoot
Spea intermontana
Great Basin Spadefoot
Spea multiplicata
Mexican Spadefoot