Cahill Wiry Flymph

Hook: 1X-long nymph hook, sizes 16 through 12.
Thread: Brown 6/0 (140 denier) to 10/0 (70 denier).
Tails: Wood duck.
Body: Copper and Copper Brown Ultra Wire twisted together.
Thorax: Hare’s-mask dubbing.
Collar: Speckled hen back.

Note: This fly can represent a light cahill, March brown, or sulfur nymph.