I like calf body hair for wings on Wulffs. It can be a hassle and does add a lot of bulk to the hook shank, but it has the tapered tips that look right. Try some turkey flats bundled to make the wings. Turkey has the tapered look and is easier to manage. Works well for parachutes as well, although I usually go with poly for those posts. For spinner wings, I go with something more transparent like antron.
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