Hans Stephenson of Dakota Angler & Outfitter ties a Fluttering Black Stonefly. The CDC split winging technique gives the appearance of the fluttering wing pairs of stoneflies. While the the fly in this video was tied to match the Early Black Stoneflies, the coloration can be adapted to other stonefly species. This style of fly is an excellent imitation of fluttering yellow sally stoneflies, when tied with a yellow body, red egg sack, and light yellow or cream colored CDC.
For the early little black stoneflies, tie this pattern in size 14-18. A strong fine diameter thread make a big difference when tying this pattern. Threads such as Tiemco's 16/0 or Veevus 14/0-16/0 are strong and build very little bulk. Using these threads on this pattern allow the tier to maintain a slender profile.
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