Go to taverley dungeon for these, and use the agility shortcut to get straight to them. Ranging is definitely the best option by far. No food or shield is needed. A lot of hopping will be necessary to find a good world. Bury the bones, keep the hides, for a bit of extra cash.
They seem to drop a few herbs, charms, and gems, but nothing decent. Hit average on them, but give quite good xp, due to high hp.
blue blues dragon dragons
