I've been exploring the Tundra with my Etelia in order to try and find their 'birth place;' I understand that there's only a small chance to find it one you enter (and that going deeper/through the green portals doesn't do anything). My question is, how are you notified that you've found the Etelia's birth island? Is it just a pop up on the screen, or is it a structure you find on said island? Will it be hidden behind the red enermies, if so? 

Thank you! 

It's a pop up message. You have to click yes to breed your etelia.

Awesome, thank you for explaining!