Friday Night Flies – Ostrich Herl Nymph by FishFinder · February 22, 2014 Friday Night Flies – Ostrich Herl Nymph Friday Night Flies – Ostrich Herl Nymph Scotty Boulder Ties up A Great Fly For Fly Fishing Called The Ostrich Herl Nymph. Best used in still water near weed beds. Share