No not just that, whilst important it is a "lightness" of dressing that stands out to me. Materials are generaly sombre & from birds found in the region, Woodcock, Pheasant, Blackbird, Starling, Jackdaw Moorhen etc etc.. The only embellishment was mayby a turn or two of gold or silver tinsel but generally nothing else adorns the "flee". If you check out the link that Donald points to & the one of Flytiers site.Conversely his other posting which includes a line drawing & old photos they should answear your questions about this unique fly type.
Tight Lines