These classic beaded nymph fishing flies are the go-to nymph fly patterns on the river Bead head, rubber legs and peacock herl body get deep in the water column quickly with good action Fish singly, in two or three nymph rigs, or as a dropper nymph pattern under a foam hopper fly One dozen hand tied Rubber Leg Bead Head Prince Fly Fishing Flies - Hook Size 12 Essential trout flies on freestone rivers where insect nymphs are an important trout food. Bead head nymph patterns get down deep quickly to where the trout and their insect nymph prey both live 90% of the time. Bead head nymph patterns also have a nice drift and swim seductively.