I will try to critique some of your work as best I can.
The Greater Red DragonThe greater red dragon looks pretty good, however, I think the wing is a little awkward. I hope you don't mind, but I yellow-lined your picture to make my point clearer. How you have the limbs right now, they would never be able to support a wing that big. However, they do look very nice with such skinny limbs and one of the animals in nature that has limbs that skinny would be the bat. So, I fashioned the anatomy of the wings after a bat to make it more believable. This is just my opinion of course (oh, and the lines for the head just help me draw the dragon as a whole, I have no critique for the head).
I would also not try making the red so bright on the dragon, right now it is so red to the point it is almost blinding. It also makes the picture very hard to look at as your eyes by nature stray to the more prominent colour which is red in this case.
I really like the design, and the colour of the fire
Contest EntryI think what is awkward about the tail is the extreme bend in it, it looks uncomfortable. I found this great picture of a curved tail,
http://www.whozoo.org/Intro2003/AmandaW ... 3_4497.JPG you can see that with a big heavy tail, the curve is very long a graceful, not short and sudden.
http://naturescrusaders.files.wordpress ... zard4d.jpg This little guy is an example of a short, sudden bend.
I love that monster by the way
Vampira You Dare Challenge Me_bak_bakVampira is looking really good but, the back legs need some work.
Animals do not stick their legs out like that. I've tried it myself and it was VERY uncomfortable. I tried to find an animal that had legs that were closest to Vampira's and I thought of the cheetah. I found some picture of them sitting that will probably help a lot.
http://cache2.allpostersimages.com/LRG/ ... LPD00Z.jpg http://www.leansixsigma-aust.com/Sitting%20Cheetah.jpg and here's a nice side view skeleton of a dog sitting so you can see how the bone bends
http://cache3.asset-cache.net/xc/dv3850 ... 6E1664D235 Hopefully these will help the leg situation
Jacob request_bakJacob's front legs look great and I love the flow of the body's form

The back leg's ankle just seems a bit too high for me. animals' legs have their ankle close to where their wrist is
http://visual.merriam-webster.com/image ... eeds_2.jpg In, fact the dragon seems to be in a play bow position that dogs use so I thought I'd find a reference for that as well
http://languagelog.ldc.upenn.edu/myl/play-bow.jpg The snake also seems a bit off, I just get the feeling it's floating rather than slithering like this
http://www.mark-ju.net/wildlife/images/ ... nake01.jpg I'm sure once you add grass it will look like he is slithering but I just thought I should mention it.
So I am done my critiquing, hope I helped a bit
