I just stepped outside Dragons Reach, having accepted the Jarl's thanks for helping him defend his city. I went outside... and there's two dragons circling overhead, fighting each other. I've never seen that before, and I've been playing since 11/11/11.

Correction: ONE of the dragons was attacking the other. The other was attacking the city. When the attacking dragon landed, I helped the guards kill it... but I can't absorb its soul. The other is just circling around, non-hostile (the guards aren't attacking it), roaring.

I think I'll change its non-hostility. Bow at the ready.

Huh, I can't actually hit it. Got some nice clean shots as it passed directly overhead me (close enough I should have hit it easily) but no hit. Guess I'll just head to Solitude.

Are You on a Console or a PC?

I am asking because I have had a Glitched Durnheviir appear when My characters with increased Max Summons because of a Bashed Patch exit an interior into Skyrim.

I have never seen two unnamed Dragons fight each other.

PC. And they are unnamed. And I have only two non-graphical mod installed (other than the Unofficial Patches): Run for your Lives! and Civil War Overhaul. (No need to move this thread; I've got a running test thread over there for CWO where I've raised the issue... but I figured I'd ask this here to see if anyone had ever seen this in Vanilla.)