Fishing with a Copper J can be most accurately compared to fishing with dynamite! This heavy metal pattern is a quick sinker, is wrapped in lead and copper wire, and is capped with a brass bead. While it doesn't attempt to match any particular invertebrate species, it can be effectively fished to imitate mayfly nymphs or a juvenile stonefly when fished in larger sizes.
This pattern falls among the ranks of Attractors, playing the role of Mrs. Robinson to Dustin Hoffman's Graduate, and is one of the most effective flies in seducing a strike from even the most reluctant fish!
Fly Category: Attractor Pattern
Family: Mayflies, Stoneflies
Life Stage: Nymph John Barr's Copper John John Barr Barr's Umpqua
Just finished a trip to Boulder Mountain in Utah. Caught Brookies and Browns on the Copper John black.
I was using this as a second option with a bead egg set up. The egg got snagged and as I was working to free the snag a rainbow hit on the copper John!