WoWDB

These guys will respawn during the duration of a snowstorm, so fly around if you've cleared out an area or can't find any where you currently are. In my experience, they don't spawn around Dun Niffelem, so I would recommend checking in the area around K3, the engine area with all the proto-drakes north of Brunnhildar Village, and around Snowdrift Plains.

This is one of the few weather dependent battle pets. It must be snowing for this to spawn. Sometimes the snow is hard to see even with graphics turned up all the way. So if you are out searching for this one don't get discouraged if it looks like its not snowing, fly around a bit and you may find one.