The Copper John Fly is one of the most popular nymphs, if not the most popular nymph in fly fishing today. Its attractive qualities given to it by the copper wire and peacock herl make it irresistible to trout. The Copper John was originally designed by John Barr and has taken on many variations since its birth. We boast a large selection of Copper John Flies that should satisfy any angler's need. Every angler should have a selection of these flies in the box.