And then the dirtbirds....the Third Fight made them sound like Redguard (mentioned their goddess Tava and "soil-briasted"). However, their nesting in the Dirt Patch sounded a lot like the underground Dwemer colonies in Skyrim. So could they be a weird fusion of the two? Can't imagine Redguards gravitating to any glitch caused by Alduin yawning but maybe that's because I didn't read up enough about their lore.