Links to a materials table and additional information regarding the Klinkhammer BWO are available on my 02/23/2020 post. I utilize three different styles of flies to mimic the small blue winged olives that hatch in prodigious numbers in western streams. My first choice is generally a CDC blue winged olive which is tied similar to a comparadun but with CDC substituted for deer hair for the wing. Frequently, however, the trout ignore my CDC BWO, and in these cases I resort to the Klinkhammer BWO. The Klinkhammer imitates a mayfly in an intermediate state of emergence with the curved abdomen dangling beneath the surface. On rare occasions neither of these flies meet the rigid specifications of the resident trout, and my fly of last resort is a Craven soft hackle emerger with no bead. I apply floatant to the body and fish the small wet fly like a dry fly in the surface film. Visibility is a major drawback to this manner of fishing.
During the 2020 season I experienced sporadic success with the Klinkhammer BWO. It yielded a selective trout on the South Platte River in Eleven Mile Canyon late in the season to help salvage a slow day. It has produced often enough to earn a spot in my fly box. When I counted my blue winged olive supply in preparation for the upcoming season, I determined that I was adequately supplied, but the number of CDC BWO’s and soft hackle emergers far outnumbered the Klinkhammers. I decided to narrow the gap on this situation, and I tied six additional flies for the upcoming season. Four were new flies tied from scratch, and two were unraveling examples, that I repaired. I expect to encounter blue winged olives in the very near future.