Hook 1XL (or 2XL) dry fly hook, #12-16 (tied here on a #12)
Thread Black 12/0 (8/0 or 6/0 also fine)
Materials
Calf tail (kip tail) White calf body hair (One large stacked clump, split into two wings)
Deer hair Natural, undyed (One fair-sized stacked clump for the tail)
Peacock herl Natural peacock herl (Three fine strands, wrapped front and rear)
Floss Yellow floss (One length for the mid-body band)
Dry fly hackle Brown (coachman brown or brown grizzly) dry fly hackle (Two feathers)
How to tie it
Mount a #12 1XL dry fly hook, lay a small thread base and leave the thread hanging at about the 75% point.
Take a clump of white calf tail at least twice as big as you need, pull the short hairs out by gripping the tips and tugging, pull out the extra-long ones, then stack it in the fattest stacker you own. Crinkly kip does not stack easily.
Measure the wing one shank-length long, put in two soft wraps keeping it on top, then work back with six or seven progressively tighter wraps; lift the butts at 45 degrees, slide your scissors in parallel to the shank and cut them off to leave a taper, then bind them down.
Take the thread to the bend and tie in a fair-sized stacked clump of natural deer hair as a tail one hook-gap long, with three securing wraps followed by medium wraps working back so it doesn't flare.
Bring the thread forward, gather all the deer hair butts, and cut them off at 45 degrees parallel to the shank so they bind down into a flat, uniform underbody.
Work the thread back to the wing, come underneath, lift the calf tail upright and build a thread dam in front to prop it; split the bunch evenly, then set the two wings with three figure-eight wraps, adding two or three turns around the base of each wing if you like a post look.
Tie in three fine strands of peacock herl at the bend, give them a light twist into a rope and take three or four wraps for the rear third of the body; tie off and cut.
Tie in yellow floss and wrap it forward and back over the middle of the body, twice if you want a fatter band, then secure it.
Tie in the same peacock herl in front of the floss, twist and take about three wraps for the front section, then secure and trim.
Tie two brown dry fly hackles in behind the wings with a little bare stem showing, secure the stems forward, then wrap both together, about three turns behind the wings and three in front, and tie off.
Gather all the forward-pointing fibres in your fingers, snip them off close, flatten the area behind the eye and whip finish.