Great looking jigs! One reason guinea feathers might be less popular these days might be all the new materials now available for jig tying?
If you ever read Greg Senyo's Fly Fusion book you'll read how he started tying flies using unconventional and synthetic materials for mostly steelhead fishing and essentially modernized the fly tying industry with new patterns. Some jig tyers (myself included) followed suit.
Today we have all kinds of cool and exciting materials to tie jigs with. The newer patterns are endless with all sorts of available resources to draw from.
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