I like the over the tree top view. Accentuates his height. I think a little more of the downward sloping bush visible on the right (as viewed, if available) would emphasize that.
Nice behavior image. Good job handling the back light from the sky. To my eye a crop from the bottom to about the top of the OOF bush would enhance the impact.
Danny, This comp works well, as these guys are so tall, and one can never fit them into the frame. Thus, we always need to think of something different to catch the viewers attention. Good DOF to get the giraffe in focus from the neck to nose.