They are at last back to where they should be. That is their real Home.
Creatures, similar to every single living animal, need to remain suitable at home.
These animals flourish best in a recognizable climate, whether land, water, or air. They get the best nourishment for their well-being and development and are at the right temperature to keep them protected and sound. Assuming that they are in known domains corresponds with their insight into their hunters and kicks in their endurance impulses.