Proto-dragons
From Twilight Wiki
Proto-dragons (also spelled proto dragons or protodragons) are the long-forgotten forbearers of the dragon species living in Northrend.
The proto-dragons were sort of the early version before dragons really evolved into the sapient, beautiful majestic creatures that they are known today.
Galakrond, a massive proto-dragon, was the "progenitor of dragonkind". From him, the Titans created the Aspects.
The Vrykul use them as flying mounts in the Howling Fjord and other parts of Northrend, and can be seen doing so in their constant siege of Valgarde. Wild proto-drakes can be seen in areas such as Storm Peaks and Sholazar Basin. Bronze proto-drakes from the Bronze Dragonshrine are used as mounts by the Argent Crusade in Icecrown. The Time-Lost Proto Drake is famous for being extremely hard to catch, a possible reflection on the species.