In theory, fly-fishing is a simple sport: Pick a body of water, choose a fly-fishing rod, select your “fly” (or bait), tie a secure knot, cast your line and, hopefully, land a fish on the other end.

Don't let a lack of knowledge stop you. These flies consistently catch trout, no matter the hatch or your fly fishing skill level. If it played out like it does in books and magazines, we would walk ...