The above pattern is little more than a Pheasant Tail Nymph (normally a swimmer nymph), but it is a bit stouter and has no wingcase…the March Brown nymph is a clinger nymph (stout and flat to hold in the substrates). The Gold Ribbed Hares Ear in tan to dark tan is a good clinger nymph.
Yes, I know..most don’t nymph for the March Brown hatch. No, the early season rise to a dry is the preferred way for most fly fishers (preferred for most hatches).
March Brown Sparkle Dun at OFFB….Yes, this little number is it.
March Brown or Rhithrogena Morrisoni
SwittersB & Exploring 