Dragon Warrior 3 (NES) - Ramia, the bird you fly around on, hatches from an egg after collecting all six orbs.

Edit - I had to change this answer. The egg the queen gives you and the one Ramia hatches out of are two different eggs. I had to look this up because it made no sense to me why a bird would hatch from a dragon's egg, unless that was Darwin's theory in motion. But regardless, Ramia still hatches from an egg.
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