The use of the springier hackle barbs makes for a “skinny” look to the Flight pattern.
Flight
Hook: Kamasan B175 #12
Thread: Benecchi 12/0, black
Rib: Wire, silver fine
Tail: Hackle barbs, dyed bright yellow
Body: Tying thread
Wing: Whiting Farms Coq de Leon hen saddle barbs, dark pardo
Hackle: Cock saddle, dyed black
Cheers,
Hans W