I agree with Cat; you need more species of trees and plants, and angle the original object 3 degrees or so. I don't like the sky. Why not start out with a plain sky until you got the scene ok? The dino's head is half hidden, better move it a bit. But it has potential!
Ah, I now see the dino's head isn't hidden, but kind of 'eats' the leaves behind it. Still needs to be moved slightly.