The Bead Head Caddis Larva imitates the premature nymph stage of a Caddis fly. Being a staple of a Trout's diet and often a indicator of good quality water. The Bead Head Caddis larva is an excellent go to fly. Working almost all year around, the Bead Head Caddis Larva is designed for a little bit faster water. Best time to use this fly is during a Caddis hatch. Can be fished by itself underneath an indicator or as a dropper in a double dropper set up. 4X to 7x tapered leader and tippet are excellent choices.