Old Blue Dun

This is # 3 on Leisenring’s favorite fly patterns list.

Old Blue Dun:
Hook: 12, 13, and 14
Silk: primrose yellow
Hackle: blue dun Hen
Tail: two or three fibers from a rusty blue dun cock hackle
Rib: one strand yellow buttonhole Twist
Body: Muskrat under-fur spun on primrose yellow silk a little silk showing through dubbing at the Tail
Wings: Starling optional

I opted not tie with a wing. I think this fly is the “old” blue dun because it is a winged fly. Leisenring did not find the wing important and preferred wingless wets but allows the option here to remove it.