I was experimenting with two kinds of ostrich herl here. I have used ostrich herl before for The Orb, a Callibaetis emerger pattern. I just thought the pic worth sharing for the qualities of this material. It would have a lot of life to it for a tail, for the gills along the abdomen or up in the thorax area for emerging wings or legs. Long strands incorporated into spey flies are frequently used for increased animation-agitation.