Whirlwing

Whirlwing is the Thunderdrum who Thornado was trying to protect in How to Pick Your Dragon. He was resting in a cave with an injured wing, and was fed by Thornado. He was obviously frightened at Stoick, Hiccup and Toothless's arrival, and even more so (understandably) when the wild boars came to attack him, but he was defended ferociously by Thornado and Stoick, who saved him from the boars. Stoick gained Thornado's trust by helping Whirlwing

Appearance
Whirlwing is a light purple Thunderdrum with small white dots on its wings. Whirlwing;s wing has large holes in it, he was probably attacked and injured by wild boars. As a result, he now wears a dark brown cast around his wings permenantly to help her fly.

Trivia

 * Whirlwing is the only Thunderdrum known to have a different color in Riders Of Berk besides the wild one in We Are Family Part I.
 * Whirlwing was referred to as a male by Stoick and Hiccup, and appears to be close to Thornado. However, some believe it is female and Thornado's mate.
 * The wild Thunderdrum in We Are Family Part I also resembles Whirlwing