My entry for the Rift contest.
This is an air colossus, as you can probably tell from the annotations and the great big wings, etc. I looked at vultures, wasps and horses.
Digitally painted from scratch in Photoshop. I wanted to do something more like a concept sheet than an action picture, so that I could focus entirely on the beast and convey its features well - I'm not quite sure exactly what is desired in this contest, but there you go.