User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-4911512-20120323004316/@comment-5020152-20120727153848

I think that Gigginox lays its eggs exclusively in the Tundra, and then the Giggi are left free to wander. Some end up in unexpected locations in their search for food. And when the few that haven't starved/been eaten become mature, they instinctively migrate back to the Tundra and start the cycle over again.