Tying A Czech Nymph
Hook: Hanak H300BL, H310BL, H330BL #8-16
Thread: Veevus 30D GSP White Thread.
Underbody: Flat lead tape.
Rib: Small oval gold french tinsel
Abdomen: Tannish yellow dubbing.
Thorax: Medium brown spike dubbing blend.
Shellback: Hends Shellback #39.
Dorsal Markings: Brown marker.
Note: A very common Hydropsyche color found in almost all rivers.
Using flat lead foil, build a weighted underbody. I used three layers of thin foil to build a torpedo like shape.
Attach your tying thread and wrap back and forth a couple of times to secure the foil weight. Attach your ribbing at this stage. Stop around 2/3 around the hook bend.
Tightly dub the abdomen. Keep the dubbing noodle tight as you wind forward to make a smooth solid body.
When you reach the 2/3 mark while dubbing forward, switch to the light brown spike dubbing mixture and continue towards the eye.
Secure the thread at the eye with a half hitch. Tying thread can be problematic at the eye on this style of hook so a half hitch keeps everything from unravelling.
Spiral the ribbing forward. I usually get 7-9 complete wraps for the entire body length.
Using a Czech Nymph cutting tool, cut a section of material used for the shellback. Tie in at the rounded end with the narrow end forward.
It helps to use your opposite thumbnail to hold the material in place at the tie in point while making your securing thread wraps.
The shellback is secured at the eye of the hook with 5 turns of securing wraps. Pull the material forward and advance the thread rearward one single turn to start the first segment which will be the head of the nymph.
With the thread advanced by one rearward counter wrap, pull the shellback rearward over the top.
Take one firm wrap of the tying thread over the shellback. This segment created our caddis head.
While keeping the tying thread taught, reach up and pull the shellback forward again. Advance the thread rearward one more counter wrap.
Repeat the previous step of counter wrapping with a single turn rearward, fold the shellback over and make another turn of thread securing the shellback with one more segment
Continue the process all the way along the length of the body.
It helps to reposition the hook in the vice to get easy access to finishing the fly at the rear.
Finish the fly at the rear. Use a clean five turn whip finish. Using firm tension with gel spun thread will bind the fibers of the thread up securing the knot.
Snip the thread and shellback cleanly at the rear knot.
Scruff up the dubbing along the ventral side of the nymph. This creates the illusion of gills.
Using a waterproof marker, color three distinct dorsal segments at the front of the fly.
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