I actually don’t know why this pattern is so effective, but who cares. The BWO Sparkle Dun is a fantastic fly throughout the entire hatch cycle, and it really is fishable in any hatch of the olives. Being the Baetis or the BWO they work great. Fish probably see BWO Sparkle Dun as an emerger.


This is an imitation of the Baetis Rhoda. The first generation hatch in my waters start in june, and continues into the first week of july. The second generation pops in early autumn, starting late August and a few weeks into September. The Baetis, or the Dark Olive, is the most common mayfly hatch in Norwegian rivers (hatches in running waters). First generation are most commonly in size 14, and the color is pale olive, almost grey. The fall hatch is much darker in color, and the sizes are from 16 down to 18.

The sparkle dun
The sparkle dun is a well known pattern. Here it is tied as a comparadun, and with a trailing chuck I guess the fly fishes both as a dun and as an emerger.


Hook: Hends BL 454, size 14
Thread: UNI 8/0, olive
Wing: Deer hair, natural
Shuck: White and olive Antron or Z-lon
Abdomen: Hends Body Quill BQ-39 Olive green
Thorax: Flyrite No X (40%) and No Y (60%)

Be careful to stack the deer hair and fix the wing with cross ties in thirds. Shuck is about 1/2 of shank

Materials are listed in order of tying

Fishing tips

Apply dry flotant. I prefer Tiemco Dry Dip

Fish dead drift