Fly Fishing Summer's Blizzards: The Trico

John Merwin describes fishing size 26 dry flies during the remarkable trico hatches of late summer as “fly fishing at its perverse best.” This piece in Field & Stream describes the habits of Tricorythodes mayflies and how to contend with the challenges they present: “The insects are very small–generally from 3 to 7 millimeters long–but so abundant in some areas that their morning mating swarms can look like a dense, smoky haze over the water.”