Hurricane

The Hurricane is a species introduced in "How to Betray a Dragon's Hero", as Snotlout's riding dragon. Very little description is given. In the beginning of the novel, "lying on his front on the island of ice was a human, chained to a sleeping riding dragon, a Hurricane, with scars and whip marks all along its side." This is revealed to be Snotlout.

Though not specifically stated, it might be assumed Hurricanes are sky dragons because "Luckily the Windwalker, the Deadly Shadow, and the Hurricane were some of the fastest riding dragons in the Barbaric World - only a Silver Phantom flies faster."

Snotlout's Hurricane makes an appearance again after Snotlout and Hiccup are escaping from Alvin's War Bunker with the King's Things. However, nothing is said about what happened to this dragon by the close of the book.