Proven on the Blood of the Proven  

These are the hardest to find. They fly around and their respawn seems random. I found one above the cave exit where you come to this area and another outside the Throm cave way up top. But never saw them there again.

Another was way the heck back behind the area and surrounded by others.

I found two just above the Throm prisoners but only one respawned the second time. The third time two more spawned. So if you want to camp them instead of running around, this is probably the place.

They have blue wings and pink bodies.