Very nice! I have good luck this time of year with deer hair jigs and I'm sure the crappie would love that fly. I'll be tying some of those to try, thanks for posting it .
They'll work fine. If you really want some cool patterns for crappie check out a guy over on Fly Anglers online Rick Z. He has some really good patterns for crappie and they sure do work for him.
On the left hand side of the screen click on FEATURES - then click on Panfish. Lots of good stuff.
Those will catch crappie for sure. I think either a fl.yellow or chartreuse tail or head with that fly would work great for crappie as well in stained water.