Watercolor over scans of bird wing bones. I have heard rumors that white is technically a “cheat” in the world of watercolors. Oh well. Cheating sure makes a pretty bird.
Pen and ink. His perch is a xerox of the bones of a human hand.
The original drawing (that I tore up to make these drawings) contained scans of the human hand, bird wings, and bat wings. At the time, I was fascinated by anatomy and the sheer brilliance of evolution and all its permutations.