Anatomical Callibaetis

Hook: Heavy wire, 1X- or 2X-long nymph hook, sizes 16 to 12.
Bead: 5/64-inch black metal bead for size 16; 3/32-inch black metal bead for sizes 14 and 12.
Thread: Brown or tan 8/0 (70 denier).
Weight: .015-inch lead wire or a substitute wrapped on the front half of the hook shank.
Tails: Three mottled-brown turkey primary fibers or pheasant-tail fibers.
Abdomen: Hare’s mask dubbing. (You may substitute rabbit or squirrel dubbing the color of hare’s mask dubbing.)
Gills: One large brown dry-fly hackle with the fibers trimmed short.
Back: A strip clipped from a mottled turkey primary feather.
Rib: Fine gold wire.
Thorax: Hare’s mask dubbing. (You may substitute rabbit or squirrel dubbing the color of hare’s mask dubbing.)
Wing case: A strip clipped from a mottled turkey primary feather. You may also tie a strip of clear or brown Stretch Flex or Scud Back over the turkey.
Legs: Natural brown or gray partridge fibers.