Hi, welcome to How to Train Your Dragon Wiki! Thanks for your edit to the Book of Dragons page.
I really admire the scientific names for the dragons, Dinoco95. You know, the Smothering Smokebreath seemingly resembles the Monstrous Nightmare if you look at its picture in its page closely. Maybe it can be a subspecies of Draco occidentalis rather than a separate species.
I take back what I say.
I take back what I say. The Smothering Smokebreath does not resemble the Monstrous Nightmare at all. So it is not a subspecies of Draco occidentalis.