Getting the urge to draw a dragon off my chest, here.

This guy is from the SunSpots universe. He's not a dragon by name, he's a Low Desert Sand Wyrm. Sand Wyrms are burrowers, and actually can't fly at all, but they can glide if they leap from a height. They're of human intelligence or a bit better, and take to languages easily. They have a tribalistic society and are generally highly private, but as trade routes can go through their territory, they will send a representative of the tribe to talk. It works well for both parties, really. The trade routes get safe passage and the sand wyrms get to satisfy their taste for camel and horse.