Dry FliesBloody Bibio
The Bloody Bibio is a dry fly pattern designed by Belarmino Martinez. This effective pattern combines traditional materials with proven techniques for consistent results in a variety of water conditions.
Spring, Summer, Fall
Beginner
Trout
Feb 2026
Overview
Belarmino Martinez's variation adds a red tag or thorax to the traditional Bibio pattern, increasing its visibility and suggesting a wounded or egg-laying insect. The added color attracts attention in choppy water or during overcast conditions. The palmered hackle creates substantial surface disturbance, triggering aggressive takes from opportunistic feeders. Works well on both rivers and stillwaters during terrestrial season.
Materials
Hook: Grip 14723BL #14
Thread: Uni-thread 8/0, red
Abdomen: Marabou barbs, red; copper wire, dark - twisted together
Thorax: Seal's fur (or substitute), fiery brown and hot orange - mixed
Behavior & Presentation
Natural Behavior: Caddis emerge in dense blanket hatches where dozens dot the surface simultaneously, creating sustained feeding opportunities during favorable conditions.
Where Trout Eat It: Fish feed selectively during mass emergences in runs, along riffle edges, and in tail-outs where newly emerged adults concentrate.
How to Fish It: Dead drift through hatch lanes with occasional twitches. The red tag provides a subtle trigger during selective feeding.
Best Water: Target riffle edges with emergence activity, seams collecting insects, tail-outs, and runs.
Strike Type: Expect confident rises or subtle sips during heavy hatch activity as fish become selective.
Fishing Strategy
Rigging Suggestions: Use a 9-12 foot leader tapering to 5X tippet for delicate presentations. Apply floatant to the body and hackle.
Seasonal Timing: Most effective during peak feeding periods at dawn and dusk. Water temperatures between 45-65°F typically produce best results.
Pro Tips: The red tail acts as a trigger point. When fish are being selective, the Bloody Bibio's unconventional profile can outperform exact imitations.
Entomology
Caddis emerge en masse during favorable conditions, creating blanket hatches where dozens of adults dot the surface simultaneously while drying their wings. Fish become fixated on these dense concentrations because the sheer volume of available insects allows for efficient feeding with minimal effort expended per capture.
- Order
- Trichoptera
- Common Name
- Caddisfly
- Organism Type
- insect
- Life Stage
- adult