The "Killer Rock Worm" is a variation of Frank Sawyer's "Killer Bug." Using black wire and green yarn. Change yarn and wire color to mimic the caddis larva in your waters.
The Killer Bug is famous in the U.K. and Europe and recently has this pattern gained a following in the U.S. This fly is renowned for its catching fish and the mythological properties of Chadwick's 477 wool used in its construction.
Frank Sawyer was a river keeper on the River Avon at Lake in Wiltshire in the U.K. and a writer and inventor of such flies as the Pheasant Tail Nymph.
The killer bug was developed by Mr. Sawyer to manage the grayling numbers on the River Avon. Then Grayling considered a coarse fish undesirable as a food or game fish.
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