NDA Art Critique Message Boards

I'm working on my anthro-lizard characters, and I'm not sure the best way to draw them from behind (not a view you see very often I suppose). Here's a quick sketch I've done:

The anatomy's not perfect, but like I said I'm mainly concerned about how the tail connects to the rest of the body. To me I think it looks a little flat. I think maybe some shading and a few extra lines might solve it, but I'm not sure where to put them and haven't had much luck finding references.
Any suggestions or even redlines would be a great help!
Thanks!

I opened this up in Photoshop and gave the tail some shading to show how I might shade it if uh... the light source was from the top right...!

I made the shading curve in a bit closer to the top of the tail, generally keeping the start of the shading close to the middle of the tail, attempting to make it look a bit like it's uh... 'popping out of the back' or some description like that instead of just falling flat down...! Yes. o_O

You could try adding a few wrinkles like the skin is maybe bunched up where the tail meets the body, which sort of emphasises the 'this is a round object connecting to the body here' effect. You could choose to do this with lines, but I did it with shading there. I hope that helps!

Dang Firequill, you just took my quick scribble and made it beautiful! (at least the tail area!) Yes, that helps lots, thank you!