User blog comment:Ion Eduard Andrei/Red death babyes/@comment-24018437-20140727073538

We probably aren't ever gonna find out the species. In order to create more Dragon species quickly, the creators of HTTYD2 had a system to put random bodyparts together of the new species. One of them just happened to look like a baby Red Death, but that was pure coincedence.

Its safe to say that, aside from the Hobblegrunt, Snafflefang and Raincutter, the majority in the Nest will always be unnamed.