From Dave Hughes 1986 “American Fly Tying Manual,” the Grizzly Wulff dry fly is a high floating semi-attractor or mayfly pattern. The distinguishing features of this Wulff style fly pattern is the deer hair upright divided wing, the deer hair tail, and yellow body.
Hook: #10-16 dry fly
Tail: Deer hair
Body: Yellow floss
Wing: Deer hair, upright and divided
Hackle: Brown and Grizzly dry fly