User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-1758220-20120104034656/@comment-4555457-20120105011750

you can see many signs of civilization in 3rd gen areas, D Island and Flooded Forest in particular

but i think the Tower may be inbetween both lands,and that's why the only monsters that have crossed the boundries have been the King of the Skies and his queen, Narga (for some reason), and Plesioth (who can swim)

we do know that the Raths migrate, so i think that's pretty good explanation for them, and we know plesioth survives in both fresh and salt water environments because the jungle has an ocean and the old desert had an underground lake, desert had an underground lake too and above lol

so how would narga get from Minegard to moga and then find its way to tower? it must have came from the opposite direction of the Raths