Originally Posted by
LineageRazor
So far, evidence points to dragons (true dragons, descended from Midgardsormr) only existing on the Source. Whether dragons on the Source KNOW about the other Shards is unclear, but they're so long-lived I'd be surprised if they hadn't learned of it at some point. There's evidence of beings traveling to and from the Shards from the Source - Ascians mostly, but Bismarck may have also made the trip in order to inspire the legends of the Vanu Vanu - so it would be surprising if a dragon never ran into one.
That said, dragons DO mostly keep to themselves, and have shown themselves to be as gullible to the machinations of the Ascians as any of the shorter-lived races. It's entirely possible that they, too, are in the dark regarding the shattered nature of the world. We do know that Midgardsormr had SOME kind of dialogue with Hydaelyn (during which they struck a deal to allow Middy to make his home on Hydaelyn), but whether she shared this tidbit with him is unknown.