Dragons - Wings

Dragon wings can be treated like arms with really long, webbed fingers, so I like to start by drawing a basic arm shape.

I add the "fingers" next. I like to make first finger shorter than the second one just because I like the shape it creates, but feel free to make the first one the longest if that's what you prefer. You could also add claws or other similar decorative features to the ends of each finger if you wanted. Optionally, you can add a thumb to the "hand" of your dragon's wing. You could add spikes, etc. instead as decoration, I just add a thumb out of personal preference.

Next is the wing membrane. The further apart your dragon's wing fingers are spread, the straighter the membranes will be because they're being pulled tight. Making the membrane connect to a low spot on the dragon's body (like around the hips or tail), the more believable its ability to fly is. The extra wing surface area between the shoulder and the hips helps to lift the dragon as it flies and without it, the dragon's rear end would hang below it as it tried to fly (unless you added something like tailfeathers to help keep that area aloft).

At this point, I sketch in the shape of the arm, which doesn't really need much explaining...

And now I've "inked" the wing and am ready to add some wrinkles to it! This is a sort of diagram of sorts showing how wrinkles might appear on a dragon's wing, but unless the fingers are close together and the membrane is loose, you don't really want to add that many wrinkles. That would look silly.

Wrinkles stretch out from certain "anchor points", which are found in places where the membrane (or article of clothing since this applies to those as well) is held more-or-less tightly in position. (Dynamic Wrinkles and Drapery by Burne Hogarth is a book worth looking into if you want to learn more about how to make folds and wrinkles in clothing and things.)

And here is the finished wing!