All eggs go here.. along with the parents... Eggs can be claimed by the parents' owners, or left to be adopted later from the rookery as hatchlings.
The nests themselves, you find to be several chambers, branching off from a main cavern like a spider's web. Within' each of the chambers is a world to each Draconic's tastes it seems.. Some are filled with naught but straw and feathers to line a typical nest.. Some are filled with gold, treasures, and jewels beyond imagining - and some still, with bones... Each pair of parents will take their own preference, and wait until the eggs arrive... But.. once they arrive, although they can return home, wouldn't it be in the best interest of the eggs to... stay and guard them? The choice, is up to you.
There's a "nest-guard" draconic.. huuuuuge male.