A rather simple bug, but a very effective for autumn.
Hook: Mustad 33903 Kink Shank, sixe 2 - 8
Tail: Living rubber
Body: Balsa
Thread: Monocord
Sealant: Epoxy
Paint: Acrylic
Tools: Razor knife, emery paper, 90 lb paper stock, paint brushes
This is a rather simple fly, as far as popping bugs go. But with a little care in painting the body, it can be a very effective one as well. Carve the balsa into a partial cone and smooth with emery paper. If a conical mouth is desired, then form it with a Moto-tool or other high speed hobbyist drill. Or use a pencil eraser and emery paper if a drill is unavailable. Slot the bottom the width of the hook shaft. Be sure to measure with the hook and excavate a spot for the kink in the shaft. Glue to the shank with clear epoxy (5 minute will do, longer setting is more durable), using 90 lb paper for spatula and mixing palette (disposable). When dry, paint a nice body with a patterned texture. The more patternedis generally the more effective. Allow to dry overnight. No cutting corners here.
When completely dry, apply a thin finishing coat of epoxy (again, 5 minute will do). Apply a short foundation behind the body, glue with tying cement, add legs (1 -2 dozen strands), and tie off with a wrap knot and cement. Allow to cure for a couple of hours before placing in a fly box.
Personally, I like to create the body / hook assemblies in advance, then use as needed. I have been known to assemble 50 at a time and store as stock. I makes for a more creative paint job without all the sawdust of sanding down the bodies getting in the way. No matter how well one tries to clean it up, it takes time to get rid of it all.
On the water, these are fished as most any popping bug, pop and allow to sit, or squiggle it across the surface in a crawl, depending on the mood of the fish. Fish slowly around visible structure and weedlines, giving the water time to play on the rubber legs. Be ready for splashy strikes.