Everything we know about Smaug's design

With the Desolation of Smaug coming out soon, I figured it would be nice to gather images from the trailers and the first movie. Keep in mind though, his design has changed some features in between the movies.

• Head

We don't see much of his head in the first movie, but we do get glimpses of it...

On theonering.net, they pointed out you can see a "crown" of horns on his head.

Then in the first trailer for The Desolation of Smaug you get to see part of his head in detail.

You can see that he has a crocodilian snout and lips.

Then in the next trailer we see more horns on his head.

• Body

Not much is seen of Smaug's  body, but we can see some of it in the picture above, and in the first movie. We get a good idea but not a clear picture.

He seems to bear a resemblance to Vermithrax Pejorative.

• Limbs

We know he has wings and hind limbs, but are his hands on his wings or does he have arms?

In the first film we saw his hand grip the door, and he proceeded to trample the dwarves. In the extended edition of An Unexpected Journey, the CGI has been changed on the scene where he tramples them. The claws have been made longer and a possible membrane is seen on his limbs.

But the hand gripping the door remain in this edition. So the big question is, does he have 4 or 6 limbs? Maybe his arms are just really small, and perhaps walks on his wings if you go by the extended edition.

A design the filmmakers wore on their sweatshirts.

As seen in this early design/concept art he has 6 limbs.

• Tail

Our last detail is the tail, there is a screenshot in the first movie.

We won't know anything for sure until the movie comes out.