The WD-40 is a midge imitation that has stood the test of time. The pattern has been around for decades and produces well anywhere that trout are found. In this video, Tim takes the pattern one step further by adding a short wing bud of CDC protruding through the wing case. It's an easy fly to tie and you can change the color simply by changing the thread you use and matching the dubbing to it.
Tie some up and sharpen your hooks!