Thread - Kimono Silk (#363/Dilly Bear Brown)
Tail - Mallard Hackle Fibers (Dyed Wood Duck Color)
Body - Nature's Spirit Hares Mask Dubbing (HMD-26/Callibaetis)
Collar (*) - Mallard Hackle Fibers (Dyed Wood Duck Color)
Lesson Learned (*) - I got the best results by tying in the hackle feather by the tip (shortest fibers and finest part of the stem). You just gotta be gentle when wrapping the feather forward, then reinforce with tying thread when forming the head of the fly.
Prepared hackle (left) and tailing material (bottom right)