Skues' BWO Nymph

Since I have plenty of cow hair I was looking for other patterns to use it and this nymph from Skues was brought to my attention.

Hook: 1 or 2 down eye round bend. Equivalent to 13 or 14.
Silk: hot orange
Hackle: dark blue dun, webby hen, 2 turns at most.
Tail: dark blue dun hen - 3 strands tied short
Body: cow hair the color of dried blood. Tied fat with no taper.

The tying process and pattern are from Skues' "Nymph Fishing for Chalk Stream Trout".