Don't let the name, Beadhead Micro Mayfly, fool you. Regardless of what you might think, trout don't know the name of the flies in your fly box, and this pattern matches a much broader swath of invertebrate families and species than just the mayflies. Just out from the egg, every mayfly and stonefly species, not matter how large they will grow, start out in the "Micro" category. The Beadhead Micro Mayfly nymph therefore is an awesome fly pattern for covering a wide gamut of species when they are still small and easy for feeding trout to pick off!
Fly Category: Generalist Pattern
Family: Mayflies, Stoneflies
Species: Blue Quill, Blue Winged Olive, Caenidae (Angler's Curse), Hendrickson, Pale Morning Dun, Pale Evening Dun, Sulphur, Callibaetis, trico, Early Brown Stonefly, Chloroperlidae, Little Yellow Stonefly, Winter Black Stonefly
Life Stage: Nymph