The scud is just hairs ear dub a tungsten bead and red thread . brush out really picky throw some hard as nails on the back and whack the trout over the head with it. Something about the red gets them juiced up. I didn't have olive thread or scud dubb that day but i do now . I have tried the same fly in olive and tan and still never work as good as that little guy with the red and no wire wraps. I think naming the flies is a lot of pressure ... So many creative ones out there that its hard to pick something. Gallup says people have made it where he wants to name his flies bill or Steve... Oh well