Walter does a great job on this fly and explains some of the downfalls / limitations of other spruce moth imitations. The first 3 and a half minutes go through a number of the common patterns used to imitate the moth, and the final time is dedicated to the Widow. Walter gives praise to the MFC threads, and I’m going to have to check these out. I’ve got mostly UNI on my bobbins right now, but the MFC sounds like it’s worth checking out.
HOOK: short shank dry, #14.
THREAD: 6/0 sand MFC (or 8/0 tan UNI).
BODY: sandy print spruce moth DK Dubbing, or equivalent.
WING: stack of tan and beige Widow’s Web.
HACKLE: light ginger or barred ginger, trimmed underneath.