Thanks. Yeah, there are thin slips of bronze mallard there; just very thin and not so obvious in the photo. Yes, it is red wool, dubbed lightly on the tying tread at the head. I also have a soft spot for a Silver Doctor, a very effective fishing fly.
As for sources, I often change my reference point to keep it interesting. I will use patterns by Kelson, Pryce Tannat, Maxwell, Francis, among others. I tend to pick the patterns on a whim or on what materials I have available.