I’m going down to the river soon and I hope to collect some bwo’s as samples to accurately id them. Not that I personally think it matters. Seems to me that a good soft hackle or flymph will do the job. The “river” I refer to is the mighty Lower Sacramento River. It’s normally fished with, oh my god...
Nice fly , no question it will work. Have you considered a bright green tag to represent the egg laying female? When they’ve laid their eggs, usually around the margins they will drift spent, ideal for a flymph. Same fly, two options!
Greenwell, many thanks for the picture of the bullfinch feather.
What is your materials reference book? Is it something you’ve acquired along the way or something you’ve compiled? Is there a substitute?