Nice to see work in progress above, I'll join in:

The 'Prototype'
I've done a number of variants over the last couple of days with white CDC instead of natural, Brown and Olive dubbings, flat wings / loops on top, rib wound in and not wound in etc.
I'm currently thinking a kind of monotone works best, as a simple and minimal fish catcher - concentrating on form rather than colours, as it's a busy little object without getting overly complex.
Even been on Youtube looking at emerging bugs, they all seem to leave a dark shell behind and come out a dull even colour, quickly airing their wings and going translucent. My head hurts thinking about the tying possibilities.
Need to get the head area a bit tidier yet, not sure about that bit that shoots up from head, either it's going to go or get better pronounced and might still resort to some colour? One to mull over, all part of the fun of fly swapping.
Could tie to preferred colours if required?
PS
Just looking at this again, gona have to minimalise that dubbing - anyone got a suggestion for natural looking dubbing that goes nice and tight without looking too busy or plastic?