C&C please.........
You're very productive. I like the subtle bird, but I would make it twice it's size, so it doesn't appear as a dust particle at first glance (that's what I thought). And I also like the drama in the landscape, terrific terrain! I think you could enhance that drama more by more dramatic lighting, darker clouds, illuminating certain parts, darkening others.
Changed the clouds and lighting.
I took the liberty to adjust it a little more. Dark clouds in the distance (where the blue is) would even dramatize it more, I guess.
One more time...........
those clouds in the last render look kinda ominous, bad storm.
nice displacements
Nice and ominous indeed, changed gamma again.