Most have heard, or surmised, that the color of The Universe is brown. We see the prevalence of brown in nature. I see it in my flybox, rows & rows of drab variations of brown. We see it reflected in the colorations of stream nymphs: brown, tan, olive, yellow. (Black is not a color.) Mix them all together & you have brown.
Combine all the people of the world into one person & you will have one, large, brown person. (How do we treat others? There are no others.)
Of course, regarding simulation, we prefer to cover the spectrum. Sometimes starkly obvious variety is what we need to turn the trick.
Aside from being a good attractor in general, his one will cover a lot of specific insects – Yellow Sally & Pale Evening Dun come immediately to mind. Good to have something all-yellow in the box.
Hook: #12-#16 (foto is #12 Mustad 3366-BR)
Thread: yellow UNI 8/0
Body: yellow goose primary swords twisted with the tying thread (3 for a #12), & a short thorax of pale yellow yarn, loosely dubbed
Hackle: yellow grosbeak body feather (flew against the window with bittersweet result)(yellow hen will substitute) ~ & finish.