It's a design for a mayfly (E. Danica) spinner. In short: This new fly concept is a synthetic version based a bit on a Deerstalker, with a little hook and a floating detached body. As shown in my previous posts about the "Squirmy Klinkhammer", squirmy floats. So this material prevents putting polluting (?) floating stuff on the fly. The hook shanks only purpose is to connect all the bits on the thorax.
Here my first few photo's. More later. If you like more specific information, let me know. My doodling is the prelude for a sort of infographic. I think that a infographic could be a nice form to
share thoughts about a fly....