Beaded Barr's Copper John nymph fishing flies are the hottest nymph fly patterns on the river Bead head and slim profile with copper wire body fly fishing nymph flies for getting deep in the water column quickly Excellent trout, panfish. bass or steelhead flies. Can be fished singly, in two and three fly nymph rigs, or as a dropper nymph pattern under a foam hopper fly pattern Pack of 6 Copper John Nymph Flies - Hook Size 12 Essential on freestone rivers where insect nymphs are an important trout food. Beaded Barr's Copper John nymph fishing flies are the hottest nymph fly patterns on the river