The elusive CamelFrog

I saw some cool animal compositions and thought I'd give it a try. I have some free Stock photos and found two that looked like they'd work for what I had in mind.
I think I got the overall alignment right, but I'm not quite happy with the transitions. I've tried clone stamping, smudging and patching followed by blending, but I'm still thinking I could do more. The green background is just so I can see better--I do have the CamelFrog on separate layers. Of course, I also have no idea what to do with it once I'm finished. Should I use it in a layout, create some appropriate background (CamelFrog environment--lush, yet dry :D)?
Anyone have any ideas?

Here it is without the background--still not quite there.