Kelly Galloup’s T & A Leech is a legendary streamer pattern that belongs in every angler's fly box. Designed by the master of streamer fishing himself, this fly is built to hunt large trout that are looking for a substantial meal. It is widely known for its incredible movement in the water, which comes from its specialized construction. While it looks simple, the design creates a lifelike swimming action that triggers aggressive strikes from predatory fish. This pattern is a top choice for targeting brown and rainbow trout in rivers, but it also works well for bass.What It ImitatesThis fly primarily imitates a leech, which is a high-calorie food source found in almost every river and lake. However, its profile and action also allow it to mimic small baitfish, minnows, or even crayfish. The pulsating materials make it look like a living creature struggling in the current, which is exactly what big fish look for.How To Use ItFish this pattern using an active retrieve. Cast it toward the banks or structure and strip it back across the current. A "jerk-strip" retrieve, where you give the rod tip a sharp twitch followed by a strip of line, brings this fly to life. You can also swing it through a run on a tight line, letting the current do the work. It works best with a sink-tip line or a sinking leader to get it down into the strike zone quickly.When To Use ItThe T & A Leech shines in low-light conditions, such as early morning, late evening, or on cloudy days. It is also an excellent choice when the water is slightly off-color or stained, as the silhouette helps fish find it. Use it as a searching pattern when you do not see any surface activity and want to cover a lot of water to find feeding fish.Why We Like ItWe recommend this fly because of its unique body construction. Unlike standard streamers that use stiff hackle, this pattern features a body made of palmered marabou. This soft material breathes and pulses with every twitch of the line, creating realistic movement that stiffer flies cannot match. It sinks quickly and maintains its profile, making it a reliable producer for trophy fish.ComparisonsGalloup's T & A Leech vs Woolly Bugger: The Woolly Bugger is a classic pattern, but it uses a chenille body wrapped with stiff hackle. This gives it a rigid profile that pushes water but lacks internal movement. The T & A Leech uses a palmered marabou body, which is much softer and flows more naturally in the water. If you need a fly that pulses and breathes even when paused, the T & A Leech is the superior option.Galloup's T & A Leech vs Galloup's Sex Dungeon: The Sex Dungeon is another famous pattern by Kelly Galloup, but it serves a different purpose. It has a large deer hair head designed to push water and create a disturbance that fish can feel. The T & A Leech has a slimmer, streamlined head and relies on visual movement rather than water displacement. Choose the Sex Dungeon for muddy water or aggressive fish, and choose the T & A Leech for clearer water or finicky fish.Galloup's T & A Leech vs Barr’s Slumpbuster: The Slumpbuster is a popular streamer that uses a strip of rabbit fur (Zonker strip) for its tail and body. While rabbit fur has great action, it becomes very heavy when wet and can be harder to cast. The T & A Leech achieves similar movement using marabou, which sheds water easily and is lighter to cast all day. If you want a fly with a similar swimming action that is easier to throw, the T & A Leech is the better pick.
