User blog comment:CuchulainSetanta/DF Championships: Vrykul vs. Aragorn/@comment-2217541-20110311030425

http://www.wowpedia.org/Proto-Dragon

The proto-dragons are the evolutionary predecessors of true dragons in the Warcraft universe. They are weaker and more savage than dragons, but are still able to breath fire and can fly. They're the chief mounts of the vrykul. You can check out the link above or my battle between the vrykul and uruk-hai for more info.