Target fish: trout, grayling
Hook: 12 - 16
Mounting thread: colour at wish
Tail: hackle fibers
Underbody: lead wire
Body: trimmed hackle, palmer style
Rib: golden metal tinsel or thin copper wire
Notes: This pattern imitates scraper flat nymphs of the Heptageniidae family, very common mayflies in the upper part of most streams.