Hook: TMC 100 or Daiichi 1180, or 1190 (barbless) #16-22
Thread: 8/0 olive
Wing: Deer Hair
Body: Olive Superfine Dubbing
Tail: Olive or -Olive/Brown Z-Lon or Antron fibers.


Tying tips: Tapering the body down towards the tail is key. With the dubbing, less is more...this fly is effective because it sits low in the water and portrays a very accurate sillouette of the natural as it is emerging into adulthood. Be careful with the wing- tie it in with the tips facing forward (towards the eye) and because it's so small, the hair will want to wrap around the body...it's hard to keep it on top of the hook because the hook is so small. Take your time!

Fishing Notes:
This can be a tough fly to fish because it is small, and blends in well with the river, making it very difficult to see. You'll really want to fish this pattern without any drag. BWO's generally hatch only during overcast conditions, but the hatches can be prolific, with the fish keying in on them hard, refusing all other offerings. Often during this hatch you can also fish an olive soft hackle. BWO nymphs generally grow up in riffles, and when they're fixing to hatch, they 'jump' off the safety of the bottom and are swept downstream as they make their way to the surface, so the soft hackle nymph may be swung in the current- i.e. cast perpendicular to the current or slightly upstream, let it sink, and the current will push the fly towards the surface. It will look to the fish like the nymph emerging, and they will eat it.