BH Copper John Chartreuse - Bead Head. This fly is a newer addition to the fly fishing world, the Bead Head Copper John Chartreuse is a mix mash of 3 different flies, the tail holds similarities to the Prince Nymph, the body holds Brassie qualities, and the thorax has pheasant tail properties. The Copper John Chartreuse with Beadhead has become a huge success because of this merging of well known flies. This fly originated in Western U.S. but has quickly spread throughout North America, and is even a familiar fly to many British anglers. The Bead-Head Copper John Chartreuse is a must need fly for every serious fly or float fisherman.