I killed two dragons on the top of the "cliff" just east of Raven Rock, when I killed the second one I noticed that the remains from my first kill were still there. The big skeletons were pretty far away from the edge of the town.
They seem to still have some life in them though, and are just as dangerous. I took the boat and when I rounded the corner to go to the forge, both of the dragon skeletons were flailing about right in the middle of town, and it seemed they could find themselves a place to rest. Went out of town, waited for a couple of hours, and when I got back they seemed to have chilled out a bit, I went about my business and carried on. I just had to complete a couple meaningless tasks, and turn in a couple of East Empire pendants before leaving the island for good, but when I fast traveled to RR, the skeletons were freaking out again, one of them was in between the roof over the forge and the alchemist's stand and ended up switching and glitching itself until it shot (with some force) right over the Retching Netch and ended up on the steps to them temple. Turns out, when guards get hit with a dragon skeleton going at warp speeds, they die. Two guards lay dead. Zombie Dragons, FTL.