The natural has two tails as an adult.
We tie it on a #18 94840 hook. Start the olive thread at beginning of hook point, wrap to the eye. Wind the thread backward to the bend leaving 2 hook eye lengths of bare shaft behind the eye. (We don't allow the body creep onto the bare hook.) Over wrap toward the bend of the hook. Stop wrapping 1 thread width from the bend.
 
Tie in a hackle clump tail. The 1st turn of thread holding the hackle clump tail (Light Blue Dun Hackle Barbs) goes directly over the last turn on the hook. Using the finger snap/pinch technique to mount the tails, with thread tension near the breaking point. Thread torque slides material to top of hook shank.
Tie in. (The tail should be as long as the length of the hook.)
The body is dubbed with olive angora rabbit) to form a carrot shaped body.
 
Stop the body when you reach the bare hook. Wrap thread forward one hook eye length, Tie in a size 14 Blue dun hackle. Wind 5 or 6 winds of hackle and tie off. Figure 8 with dubbed thread drawing the hackle barbs to the top of the fly forming a hackle barb wing. Tie off.