- Grab your colored pencils and color these 24 beautiful grayscale images of birds by illustrator Ruth Sanderson. The book contains 2 full sets of the images, in both lighter and darker grayscale, for a total of 48 pages to color. Choose your preference or color both versions. Robins, wrens, an owl, parrots, hawks, hummingbird, and more! - GRAYSCALE COLORING is different from coloring line art, and fun to try out if you enjoy realistic pictures. Choose pencil colors that match the values of the grayscale and the tonal shading will give your artwork depth and subtle beauty. - Colored Pencils are suggested for the best results on this paper. Each picture is printed single-sided on 55 lb. pure white paper.