This pattern style has several variations that the tier can use to move between a Mayfly emerger (Hairwing Dun) to a Caddis (Matthews X-Caddis & the Elk Hair Caddis). The Elk hair wing is central to the three patterns. The Eld Hair Caddis would have the palmered hackle and no tail. The Hairwing Dun has a modest hackle wound beneath the Elk Hair wing and still can have the tail (feather barbs or synthetic fibers).

