Dry FliesMegabyte
Paul Slaney's Megabyte forms its abdomen and rib entirely from tying thread, flattened for the body and corded for the rib, then adds a white or cream hackle-barb wing over a black, claret, and red seal's fur collar. The mixed seal's fur gives the thorax a mottled, buggy look for mayfly and caddis hatches.
Spring, Summer, Fall
Intermediate
Trout
Feb 2026
Overview
Building the whole abdomen from tying thread rather than a separate body material keeps the fly slim and its proportions consistent from fly to fly, a hallmark of the sparse North Country style. The 2:1:1 blend of black, claret, and red seal's fur in the thorax reads as a dark, slightly warm collar rather than a flat black, giving the fly more depth beneath the surface. African goat is a workable substitute where seal's fur isn't available, without changing the fly's profile.
Where to Buy This Fly
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Materials
- Hook:
- Grip 14723BL #12
- Thread:
- Sparton 6/0, black
- Abdomen:
- Tying thread - flat
- Rib:
- Tying thread - corded
- Wing:
- Hackle barbs, white or cream
- Thorax/collar:
- Seal's fur - black, claret, red - mixed 2:1:1 (or substitute, such as African Goat)
Behavior & Presentation
Natural Behavior: Large mayflies and caddis create substantial surface profiles during emergence, with wings held prominently while bodies dry. Bold silhouettes trigger aggressive feeding.
Where Trout Eat It: Fish rise to substantial adults in the upper 6 inches, especially in feeding lanes.
How to Fish It: Dead drift with the large profile riding high on the surface through productive lies.
Best Water: Tail-outs, pocket water, seams, and foam lines during large insect hatches.
Strike Type: Aggressive rises with fish fully committing to the substantial, visible profile.
Fishing Strategy
Rigging Suggestions: Fish on 12-18 foot leader tapering to 6X-7X fluorocarbon tippet. Ultra-fine tippet supports delicate micro presentation needed for ultra-selective technical feeders.
Seasonal Timing: Most effective during midge emergences March through May and again September through November when water temperatures range 40-55°F. Technical creek fishing peaks during mid-day periods 10 AM-4 PM when tiny insects emerge.
Pro Tips: Sparse design allows light to pass through naturally, creating subtle visual cues matching tiny naturals. Focus on perfect drag-free drift as micro size offers no room for presentation errors.
Entomology
Adult caddis rest motionless on the surface tension between flights, occasionally twitching their wings or adjusting position. This stillwater behavior presents an irresistible stationary target that trout sip confidently without wasting energy on pursuit.
- Order
- Trichoptera
- Common Name
- Caddisfly
- Organism Type
- insect
- Life Stage
- adult
