I like these type of shots, but your one seems to be too dark on the main tree truck making it almost black with very little detail. I think you have two choices here, either lighten up the main truck or take the photo again but don't get so close to one tree this way you will see more smaller trucks and the nice branches being silhouetted against the blue sky. I have just read your description again (squirrel road) and I can now see what you were trying to do, but having the foliage at the bottom left hand corner sort of loses the tree truck a bit, so if this is what you were trying to do then maybe try and find a tree that has no foliage behind it so that it will silhouette against a lighter background.

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Beacon Images