A simple and very efficient method to increase the visibility for small CDC dry flies tied on #16-22 : adding a small bunch of white CDC barbs in front of the wing.
In certain cases I use yellow or pink instead of white, especially at sunset when the light and the shadows become metallic.
Here is the step by step:
Materials for this fly:
Hook: Maruto Dohitomi D04 BL #16
Thread: 70Denier Olive
Body: Devaux yellow thread for bodies
Tail: coq de leon indio claro
Torax: mad rabbit dubbing
Wing: CDC Khaki Campbell feathers
Hi-Vis: white CDC barbs tied in front of the wing