Silverwing was a silvery she-dragon of House Targaryen, hatched, the legend says, from an egg her sister Rhaena laid in the cradle of Alysanne Targaryen in 36 AC. Docile by a dragon's measure and friendly even to strangers, she was often found coiled with Vermithor, and she carried Alysanne beside King Jaehaerys on his progresses for half a century: to Oldtown in 54 AC, where she alighted atop the Hightower and fanned its beacon with her wings, and north in 58 AC to White Harbor, Winterfell, and the Wall, where she would not fly beyond the ice. The queen rode her for the last time in 93 AC, weeping as she climbed down, and after Alysanne died in 100 AC Silverwing went back to Dragonstone and lairs in the smoking caverns of the Dragonmont.
She was the gentlest of the riderless dragons offered at the Sowing of the Seeds in 129 AC, the only one not recorded to have killed a man who tried her, and the dragonseed Ulf White won her. He rode her in the Battle in the Gullet and at the First Battle of Tumbleton, where he and Hugh Hammer turned their cloaks and the dragon burned the town for King Aegon II. When Ulf was poisoned by Ser Hobert Hightower she went riderless again, and Lord Unwin Peake's bounty for a highborn rider cost one knight his arm and another his life. One of only four dragons alive at the end of the Dance, she grew wild under Aegon III and made her lair on an island in Red Lake, where the young king would not go to claim her, and she was dead by 153 AC.