I drew it myself.
Never seen a dragon before? :-D
I have received a lot of questions about this avatar.
It's from this hobby project of mine, to create a physiologically "realistic" dragon fitting most of the
legends. I have a full biological history of the Dracocephalum Elementalis Rex, commonly known
as The Great Dragon, including a full internal/external anatomy.
(Better apply that physics/mathematics education on something useful, right?)
There is a lot of inconsistency in dragon-lore I can tell you. It's not easy to explain the physics of a eight-tonne creature being able to fly..
.
SlimJim