Possibly three species? What we don't know is whether they are even ligitimate species, or if they are playing the same game as with the salamanders, where the alleged 'species' are visually, and physiologically identical, and are really just different 'families.'
We take good care of our frogs and salamanders at our place, because they eat the critters that eat us!
You're right about that, but we've got to allow some truth-claims to remain standing as a basis for the discussion until we get data that says otherwise. So, I opt to allow the species numbers as a "given", for the time being.