I've killed a Dragon at both Winterhold and the College of Winterhold several times. In fact, if it is the same dragon as the one at Mount Anthor, I've killed it a couple of times more. It started out as a simple dragon and it is now a blood dragon. I think it might have been getting tougher to reflect my level. I think I've killed it around ten times already. It's skeleton disappears everytime I leave the place (I think I fast travelled every time) and come back (usually after some in game days, other quests and the like take up time. (:), it is no longer there. After spending some time in the area, it always appears and I end up killing it yet again, getting another dragon soul and other loot. I was wondering if this was a bug or if this was normal dragon behavior. I thought dragon bodies were not supposed to disappear?
Note: As evidenced by my other question, I have had bugged dragons before. The one in that question ended up appearing as a dead body at another quest location for no reason after all the trouble I explained earlier. This is just in case anyone is looking at both questions and there is a relation.
Thanks for taking the time to read this.
Best Answer
This is business as usual. Dragons respawn, and if their bodies didn't disappear eventually most cities would be rotten with dragon carcasses.