Consensus of Hackles and Herl Fly Fishing, Tim Cammisa and tightlinevideo
Hook 14
Materials
Hook Scud hook, size 14 (Hackles and Herl); 2X-short emerger hook, e.g. Dai-Riki 125, sizes 14-18 (tightlinevideo); Allen N204BL, 2X wide and 2X short, tied on a 12 (Tim Cammisa)
Bead Gold-coloured brass bead sized to match the hook (Hackles and Herl); 7/64-inch gold (tightlinevideo); tungsten, colour not stated (Tim Cammisa)
Thread Black 8/0 (Hackles and Herl: Semperfli Classic Waxed; tightlinevideo: 8/0 or 70 denier); Tim Cammisa uses dark brown Uni 8/0
Rib Flash: Semperflash Mirage Iris (Hackles and Herl); small pearl Flashabou (tightlinevideo); pearl Crystal Flash (Tim Cammisa)
Tail Brown Hungarian partridge hackle fibers
Body Hare's ear / hare's mask dubbing, light (tightlinevideo); Tim Cammisa uses dark brown dubbing for a dark version, tan for a tan one
Hackle Hungarian Partridge Hackle
Collar / thorax Peacock herl
How to tie it
Put the bead on a debarbed hook and start the thread.
Take a small brown Hungarian partridge hackle, pinch the fibers together and tie them in as a tail about the length of the hook gap.
Tie in the rib flash, then take the thread back to the tail.
Dub a tapered body of hare's ear dubbing, making the first wrap behind the rib so it does not slide; bring it forward and half hitch.
Wind the rib forward, tie it off and clip the excess.
Take a Hungarian partridge feather from nearer the neck, concave side toward the back of the hook so it lays back over the body; fold it back and tie it in, leaving a landing pad for the hackle and herl.
Make only one to one and a half turns of hackle, sweep the fibers back, secure it and trim the stem.
Turn a peacock herl fiber upside down so the taller flues point toward the bottom of the fly, tie it in and wrap it as a collar; trim.