This is the Perdigon version of the fly i have been developing for close to 20 years, the Huck Green Caddis Cripple. This fly kills. It absolutely kills in fast and/or deep water where it’s impossible to get a normal fly down to where the trout are feeding because of fast current.
This is my goto fly and i frequently combine it with it’s crippled brother that i originally developed. in a traditional two nymph set up it can be fished dry/dropper or hopper/dropper. That means it can be effectively and typically fished with a “tag” fly, size 14 above and a trailing fly, size 16 below like is done in traditional euro nymphing. In reality this fly provides all the effectiveness of raking the river by Euro Nymphing, but, unlike in euro-nymphing (or tenkara) you sill get to cast…and cast beyond the ~20 foot limitations of euro nymphing.
This is a “must have” fly in the fast runs of the Upper Kern River where the big kern river rainbows cannot resist the flash in crystal clear water. It fishes well all year long in many conditions because it is an attractor, yet looks like a green rock worm, which is a caddis nymph.
This fly is built on a barbless competition style jig hook. It’s wide gap provides a dramatically better hook set than a traditional hook. You’ll find your land to hook ratio will be much better than in a traditional nymph hook. I tie these with an oversized tungsten slotted bead. Then I stuff the slot gap with lead. Combined with it’s sleek epoxied body, this fly gets down in a hurry. the tail is made of UV coated coq de leon feathers. you can read all about the benefits of perdigon style flies in my article here.