User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-7584137-20140825113054/@comment-25165468-20140831063749

What could also be possible is that both share a common ancestor that lived in a similar area. As climate change occured however, what used to be 'agnancestors' adapted to new climates through the process of natural selection. I say this because it would be very unlikely that a creature so perfectly adapted to a frigid area such as the tundra could migrate to a completely opposite environment and evolve the necessary adaptations that quickly to survive (and vice-versa).