Take a beadhead Pheasant Tail and give it a heavier bead, and you have a faster sink rate, and slightly different action to foll even the wariest of fish
Something about hackled nymphs drive fish crazy.
The extra bugginess can give nymphs a buggy and leggy look.
Flashback gives this pattern a emergence look.
Many nymphs take on a very shiny appearance right before emerging.