The pheasant tail nymph is one of the oldest flies still in general use. It has remained popular over the years because it is incredibly effective. It mimics a variety of freshwater organisms that fish like trout love to eat. When nothing else works a small pheasant tail will often prevail. The flashback pheasant tail has a big of flash material on the wing case that reflects and shines just enough to bring in more bites. The bead head helps get it down deep where trout live fast.