The Trico Dark Spinner is among the most versatile and best trout flies on the market. They can be fished sub-surface, as emergers, or simply as dry flies. Tie them on with light tippet a focus on creating a dead drift by high-sticking your fly rod or creating mends in your line to slow the drift down. If mayflies are in the area, this trico fly will do the trick. It’s good to have a bunch of these little guys in your box no matter where you’re headed.