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Exact group of three source-identified X-Caddis flies with brown deer-hair wings, pale bodies, and amber trailing shucksReal photo · X-Caddis dry flies

Emerger · guide 11

X-Caddis

Craig Mathews's low-riding, hackleless caddis transition pattern, built with a thin trailing shuck, dubbed body, and tented deer- or elk-hair wing.

Common size
#12–20 in the reviewed Fly Fishers International recipe, Orvis example range: #12–16; match the local caddis
Common colors
amber-gold or caddis-gold shuck, tan, brown, olive, or black body, natural deer- or elk-hair wing
Imitates
caddis adult still attached to or struggling free of its shuck, low-riding crippled or emerging caddis, general caddis surface transition when size and color fit
How to recognize it

Identify the X-Caddis by the combination of a sparse translucent Zelon-style trailing shuck, slim dubbed body, tented deer- or elk-hair wing, small clipped head, and no palmered body hackle. The separately photographed Elk Hair Caddis has a higher, hackled adult footprint and no defining trailing shuck. The natural-adult photograph explains the caddis tent-wing silhouette, but it does not turn the X-Caddis into an exact adult-species imitation.

Fly Fishers International dates the X-Caddis to about 1980 and credits Craig Mathews and the Blue Ribbon Flies team in West Yellowstone. Mathews has also described the design as adapting the Sparkle Dun idea to a caddis by combining a shuck, simple body, deer or elk hair, and no hackle.
Exact group of three source-identified X-Caddis flies with brown deer-hair wings, pale bodies, and amber trailing shucks
Real photo · exact pattern

X-Caddis dry flies

Exact source-identified X-Caddis group and the gallery's only exact photograph. The single frame shows three hand-tied examples—not three viewing angles or three different named variants. The next images are an Elk Hair Caddis comparison and natural adult caddis reference.

View
exact pattern — source-identified X-Caddis group
Color shown
warm brown deer-hair wings, pale bodies, and amber trailing shucks
Look for
Three exact source-identified ties show the low hackleless body, splayed deer-hair wing, and trailing amber shuck from different natural resting angles.
Open full-size photo ↗

On the water

Know when and how to fish it.

Use these tips as a starting point. The river, depth, insects, and fish behavior still decide the final presentation.

01

Why it works

  • The thin translucent shuck supplies the vulnerable transition cue that separates the pattern from a clean adult caddis silhouette.
  • Its hackleless body can sit low in the surface film while the buoyant hair wing preserves a readable caddis tent-wing profile.
  • A simple size- and color-matched body lets the same verified architecture cover several caddis events without claiming one universal species or hatch.
02

When to use it

  • When trout take caddis adults, cripples, or emerging insects low in the film rather than chasing a skittering high-riding dry.
  • During a verified caddis hatch or evening rise, especially in glides, seams, riffle margins, and softer bank water where a drag-free low profile is visible to fish.
  • As a caddis searching dry outside obvious surface activity only when local season, insect size, and water conditions make caddis plausible.
03

How to fish it

  • Start with a drag-free dead drift on a floating line and place the fly in the observed rise lane.
  • Apply floatant primarily to the hair wing when the low body-and-shuck waterline is important; drying or dressing the entire fly can make it ride higher than intended.
  • Match body color and hook size to the caddis actually present, then correct drag and drift lane before changing the pattern.
  • Use deliberate movement only when natural adults are visibly skating or ovipositing; the default reviewed presentation is a quiet drift.
04

Mistakes to avoid

  • Calling an Elk Hair Caddis, generic hair-wing dry, or any caddis pattern with a tail an X-Caddis.
  • Adding palmered hackle or omitting the trailing shuck without labeling a different pattern or variation.
  • Using too much Zelon so the shuck becomes stiff, opaque, or widely splayed instead of thin and translucent.
  • Coating the entire fly with floatant when the intended advantage is a low body in the film.
  • Presenting the single three-fly group photograph as multiple independent exact views, or presenting either comparison photograph as another X-Caddis.

At the vise

Tie this version.

Bubble-shuck X-Caddis — reviewed Fly Fishers International form · intermediate

This guide documents Fly Fishers International's looped bubble-shuck treatment. The same source identifies a sparse straight-cut shuck as the original X-Caddis style. Keep straight-cut, bubble-shuck, body-color, and hair-density changes labeled; the exact group photograph is not presented as a measured tying sequence.

Materials

Hook
Standard dry-fly hook, sizes 12–20; the reviewed source lists TMC 100, 5210, 100BL, 900BL, Daiichi 1310, Mustad 94840, or equivalent
Thread
6/0 or 8/0 thread selected to match the body
Trailing shuck
A sparse amount of crinkled amber-gold or caddis-gold Zelon or Z-Lon
Body
Dubbed beaver or Antron in tan, brown, olive, or black to match the natural
Wing
Cleaned and stacked deer or elk hair
Finish
A small clipped hair head and optional flexible head cement

Steps

  1. Start the thread near the bend, wind forward to reserve roughly one and one-half to two eye-widths, and create a flat thread base where the wing will sit.
  2. Secure less than a normal shuck-sized amount of Zelon near the front of the body area, twist it lightly, fold it back into a narrow loop longer than the hook gap but shorter than the shank, and secure the returning end.
  3. Twist the loop into a slim bubble and bind it along the top of the shank toward the bend, stopping where the shuck should begin.
  4. Dub a slim body forward to just behind the reserved wing location, keeping the shuck visible and the eye space open.
  5. Flatten the thread for the wing base, then add twist before the securing wraps so the thread grips the hair instead of allowing it to roll around the hook.
  6. Clean and stack the deer or elk hair, align the tips near the back of the body, and secure the bundle directly on top with controlled wraps moving rearward from the first tie-down point.
  7. Whip-finish tightly against the wing, trim the hair butts into a small caddis-like head, and add only a trace of flexible cement if desired.

Tying sources: Fly of the Month: X-Caddis ↗, How to Tie Craig Mathews's X-Caddis ↗

Common variations

Small changes can make a different fly.

One verified, non-AI group photograph shows three source-identified X-Caddis dry flies; it is one exact group image, not three separate X-Caddis angles. A separately named Elk Hair Caddis and a natural adult-caddis photograph are identity and insect-form comparisons only—not extra X-Caddis examples, exact variants, local hatch evidence, or duplicate crops used to overstate coverage.

Source-identified X-Caddis group

One exact group photograph containing three source-identified X-Caddis ties with hair wings, low bodies, and visible trailing shucks. It is a single photograph, not three gallery angles.
Colors shown
brown and rust bodies, amber shucks, natural hair wings
Weighting
No bead or external weight is visible; the source does not establish hidden ballast, hook size, or the exact shuck treatment of each fly.

Elk Hair Caddis identity comparison

A separately named Elk Hair Caddis used to compare its palmered hackle and higher adult-style footprint with the X-Caddis's hackleless body and trailing shuck.
Colors shown
tan body, brown hackle, natural elk-hair wing
Weighting
Unweighted dry-fly comparison; not an X-Caddis variation.

Natural adult caddis reference

Multiple natural adult caddisflies on foliage show tent-folded wings and long antennae. They are natural insects, not an exact species match, artificial recipe, local hatch record, or emerging-stage photograph.
Colors shown
brown wings and bodies, pale antennae, green foliage
Weighting
Natural-insect reference; no hook, tying material, ballast, or fly presentation is implied.

Related patterns

Elk Hair Caddis ↗Caddis Pupa Patterns ↗Sparkle Dun ↗Soft-Hackle Wet Flies ↗

How this guide was checked

Fly information and photo sources.

Guide checked on 2026-07-13. Every image has its own source and usage record. Natural insects and hand-tied flies can vary in shape and proportion.

Pattern sources

Fly Fishers InternationalFly of the Month: X-Caddis↗Orvis NewsHow to Tie Craig Mathews's X-Caddis↗Orvis Fly-Fishing Learning CenterThe Magic of Pheasant Tail, with Craig Mathews↗

Image credits