The dragon is the symbol of the Targaryens, but the creatures themselves are generally considered to be extinct. Their bones are highly prized. Full-grown dragons were large enough to eat a horse in one gulp. Like most dragons, they have fiery breath and can fly. They were first brought to the Seven Kingdoms by the Targaryens, three thousand years ago; a century and a half ago, the last misshappen hatchlings on Dragonstone died after living only a short time. Dragon's eggs are still sometimes found, hard as rock, patterned in rich colours, with scaly surfaces.