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Bloom’s Caddis Fly Step-by-Step:
With a visit to RMNP right around the corner, I’ve been busy these past few weeks restocking my trout boxes. This means a wide array of terrestrials, stoneflies, mayflies and, of course, caddisflies. While there’s no doubt that Al Troth’s EHC is the go-to when it comes to caddis imitations, I couldn’t help but use this trip as an opportunity to try my hand at a new (to me) pattern.
The creation of long-time Montana guide, Dave Bloom, his aptly named Bloom’s Caddis utilizes an Elk Hair down-wing and parachute hackle creating a buoyant fly that rides low in the water. Highly visible when paired with a “Hot-spot” post material, I have high hopes it will prove irresistible to the small stream trout that await in me in Colorado.
|Tiemco TMC 100 or similar (size 12-18)||Veevus 12/0 or 70 Denier (Black)||Pheasant Tail or Turkey|
|Ultra Wire (S or XS; Gold)||Elk Hair (Natural or Blond)||Dubbing of Choice (Tan/Brown)|
|Antron or Para Post (White, Orange or Pink)||Dry Fly Hackle (Cree, Brown or Grizzly)|
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Bloom’s Caddis Fly Step-by-Step Tying Instructions:
(Mobile Viewers: Click images to enlarge or rotate phone to landscape)
Tips and Tricks
- Parachute Posts – To create the parachute post as shown above secure a 1.5-2” strip of post material (antron or para post) with two wrap of thread across the top of your hook shank. Pulling both ends vertical, make 2-3 wraps in front of and behind the post material. Finally, invert your bobbin and carefully wrap your way up the post material. This may take a little practice as swapping hands as you rotate the bobbin may be a challenge. Keep at it though, until the bottom ¼” of post has been secured with thread wraps.
- More than a Caddis – While the pattern above was specifically designed to imitate a caddis, Bloom’s pattern has also been modified to imitate other down-winged insects. In particular, Bloom’s Yellow Sally warrants mention as a quick change in dubbing color and the addition of a CDC underwing are all that is required to mimic these small stoneflies as well.
- Post as Hot Spot – Generally speaking, Bloom’s patterns utilize pink or orange post material as a hotspot to help the angler track the pattern on the water. In contrast, I utilized white as I’ve found it to be the most visible to my eyes when tracking a fly through polarized lenses. If you’re unsure which works best for you, try a few in both colors and take them out for a test run.
Proof of Concept
As with last week’s Step-by-Step, you’ll have to wait and see on Bloom’s Caddis. But with a visit to my favorite stretch of the South Platte and RMNP just days away, we hopefully won’t be waiting too long.
Species Caught on the Bloom’s Caddis Fly to Date:
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