These studies are done in watercolor on vellum, a prepared animal skin. Each painting is life-size, and most paintings are under 1" square. I began painting these in 2015, and have continued to learn more about the delicate and exacting process of working on vellum.
Unlike watercolor paper, the surface of vellum is not absorbent, and the paint sits on top of the substrate rather than sinking into the fibre structure. Each layer must be carefully laid on top of the previous one, without disturbing and lifting it off.