I was wondering the other day, how did the Harpy species (native to Elona) spread to Tyria? I think it's logical to assume they would'be have been able to cross the Desolation nor the Ocean (and Kralkatorrik later on) to reach the northern continent, and I find it highly unlikely they would have actually made the long trek around these obstacles solely to arrive in Tyria.
I thought something along the lines of some Elonians bringing Harpies along with them (traders or refugees), but why would they do that? Harpies aren't known for being the most cooperative creatures so why bring one with you on a long voyage to the north? This is just a little thing, but it's been bothering me for a while.