The stonefly nymph is a classic fly pattern that belongs in every angler’s arsenal. Known for its simplicity, effectiveness, and versatility, this fly imitates the larval stage of stoneflies, a favorite food source for trout, steelhead, and other freshwater species. Among the most popular stonefly nymph patterns is the Pat’s Rubber Legs, also affectionately known as the “Girdle Bug.” This guide will walk you through how to tie it, properly add weight, and explore its variations to maximize your success on the water.
Why Stonefly Nymphs Work
Stonefly nymphs are large, protein-packed insects that live in cold, fast-moving rivers. Their size and abundance make them a staple in a fish’s diet. Stonefly nymphs are especially vulnerable when dislodged from the riverbed, making fly patterns like Pat’s Rubber Legs an irresistible meal for trout and steelhead. The rubber legs and bulky body of this fly create lifelike movement, increasing its appeal.
Materials for Pat’s Rubber Legs
To tie the Pat’s Rubber Legs, you’ll need:
- Hook: Nymph hook, sizes 6-10 (2XL or 3XL for larger profiles).
- Beadhead: Tungsten or brass bead for weight (optional).
- Thread: Black or brown, 6/0 or 8/0.
- Legs: Barred silicone or rubber legs (color combos like black/orange, olive/brown, or white/black).
- Body: Chenille (black, brown, or other natural tones).
- Weight: Lead-free wire (optional for sinking power).
- Ribbing: Fine gold or copper wire (optional for added durability and segmentation).
Step-by-Step: How to Tie Pat’s Rubber Legs
1. Prepare the Hook
Secure the hook in your vise. If using a bead head, slide it onto the hook before clamping the hook. Start wrapping thread just behind the bead and create a smooth base down to the hook bend.
2. Add Lead-Free Weight
- Cut a 4-6 inch piece of lead-free wire.
- Wrap 8-15 tight turns around the shank, leaving a small gap behind the bead or hook eye.
- Push the wire wraps forward to snug them into the bead if using one. Cover the wire with thread to lock it in place and create a smooth base.
3. Tie in the Tail
Cut two pieces of rubber legs about 1.5 times the hook length. Secure them at the hook bend, letting them extend outward evenly on each side. These mimic the stonefly’s long tails.
4. Secure the Body Material
Tie in a length of chenille (or dubbing loop) at the hook bend. If you’re using wire ribbing, tie it in as well at this stage.
5. Wrap the Body
Wrap the chenille forward in even, overlapping turns to about two-thirds of the hook shank. Secure and trim the excess chenille.
6. Add the Legs
Cut two more pieces of rubber legs and tie one on each side of the hook. Adjust their position for symmetry. Allow the legs to stick out naturally, as they’ll move in the current and attract fish.
7. Create the Thorax
Tie in a shorter piece of chenille and build up a slightly bulkier thorax. Wrap it tightly and secure it behind the bead or near the hook eye.
8. Finish the Fly
Whip finish the thread and trim the excess. Apply head cement or UV resin to the thread wraps for durability. Trim the legs to the desired length, ensuring they’re proportionate to the body.
Adding Weight to Your Fly
Adding weight is crucial for getting the fly down into the strike zone, especially in fast-moving rivers. Here’s how to add weight effectively:
- Positioning the Weight:
- Wrap lead-free wire in the middle of the hook shank for a balanced sink.
- For a jigging motion, position the weight closer to the bead head.
- Number of Wraps:
- Use 8-10 wraps for moderate weight or 12-15 wraps for a heavier fly.
- Combine with Tungsten Beads:
- For maximum sinking power, pair lead-free wraps with a tungsten bead.
- Durability:
- After wrapping the wire, cover it with thread and secure it with a drop of super glue or UV resin.
Alternative Names and Variations
The Pat’s Rubber Legs is just one variation of the stonefly nymph. Here are some other names and patterns to consider:
- Girdle Bug: An older version of Pat’s Rubber Legs, often tied without a bead head.
- Kaufmann’s Stonefly Nymph: A more realistic pattern using natural materials like turkey biots and peacock herl.
- Bitch Creek Nymph: Features a two-tone chenille body and rubber legs, effective for both stoneflies and large caddis nymphs.
- Golden Stonefly Nymph: Tied in golden hues to mimic golden stoneflies.
- Black Stonefly Nymph: A darker variation for imitating smaller black stoneflies.
- Rubber Leg Stonefly: A general term for flies tied with rubber legs for lifelike movement.
How to Fish a Stonefly Nymph
- Nymphing Rig: Use a two-fly rig with the stonefly as the anchor fly. Add a smaller dropper like a midge or mayfly nymph.
- Indicator Fishing: Attach a strike indicator and drift the fly naturally in deep runs or fast riffles.
- High-Stick Nymphing: In fast water, keep your rod tip high and follow the fly’s drift closely.
- Swinging: Let the fly swing across the current at the end of the drift. This mimics a stonefly nymph swimming toward shore.
Pro Tips for Success
- Customize Colors: Experiment with colors like olive, orange, or tan to match local stonefly species.
- Durability: Use UV resin or head cement over thread wraps, especially on the thorax and head, to reinforce your fly.
- Keep Legs Symmetrical: Evenly spaced legs create a more lifelike appearance in the water.
- Adapt for Conditions: Add more weight for deep runs and faster currents, or use lighter flies for shallow water.
Conclusion
The Pat’s Rubber Legs and other stonefly nymph patterns are essential tools for any angler. Their simplicity, durability, and lifelike movement make them effective in a variety of conditions. Whether you’re tying a classic Girdle Bug or experimenting with a new color scheme, mastering the stonefly nymph will elevate your success on the water.
By following the steps in this guide and customizing your flies to suit local conditions, you’ll create stonefly nymphs that not only look great but also catch fish consistently. Happy tying, and tight lines!
