Fly lines come in various tapers, styles and colors. This action allows a near-weightless fly to be propelled across the sky. Fly line colors range from yellow to muted green shades. Stay away from bright colors as these can alert the fish. Check with a local fly shop for the latest recommendations.
Leaders are the last link.
They are tied at the forward end of the fly line and terminate at the fly. Try to use the smallest diameter leader possible. An oversized leader can be seen readily underwater, causing a fish not to strike. Use the green in the Guadalupe or Medina Rivers, or in off-colored water. Through the day a leader may get shorter, due to replacing lost flies, removing ineffective flies or retying because of a frayed leader tip.