The perfection of the Killer Bug fly is its simplicity and its ability to make trout eat that passed up every other fly in the box. It's not imitating one specific insect larva, rather taking the best qualities from most of the subsurface insects trout feed on.
We tie our Killer Bugs with authentic Shetland Spindrift wool yarn in Oyster color to replicate the qualities of the original Chatwick's wool yarn. This spectrumized blend of colors pulls light through the yarn to reveal the light shrimp pink colored underbody that we tie with Semperfli's very special Fluoro Brite #2 thread. This high UV component seems to be the trigger that makes this fly work at every depth and every light condition.
Tiny air bubbles cling to the micro fibers of wool, giving these bugs a breathing, lifelike appearance to fool even the most experienced trout.
These are tied on size 12, premium Firehole #317 hooks and wrapped with 8-10 wraps of .015 lead wire.