The feathers had so much sheen to them that after I finished painting, I mixed up some of the Schmincke dry gold gouache and added some sparkle to them. Unfortunately, that isn't visible on the photo. However, you can see the coppery shimmer on the border from the iridescent acrylics that I used to prepare the page ground and border.
Inks used: Private Reserve Copper Burst and Private Reserve Sepia
Pens: Pilot Parallel 1.1mm, Pilot Petite
Winsor Newton and Daniel Smith watercolors
Winsor Newton, Schmincke and Holbein gouache
Pages prepared in advance using Golden Fluid and Golden Fluid Iridescent acrylics, and F&W Acrylic Inks
Painted across a two page spread in a 5.5x8.5" Stillman and Birn Hardcover Alpha sketchbook