Saddle Case Caddis
Other Common Names: Igloo Caddis
Scientific Name: genus Glossosoma
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About Saddle-case Caddis
These little guys build a dome-like case from pebbles and attach it to a large rock in a riffle or a run with moderate to fast current. They are so firmly attached and protected that cased larvae are rarely found drifting in the current.
However, a larva will outgrow its shelter and leave it to build a new one. This happens often enough that uncased larvae are regularly seen--and eaten--by trout. So a creamy larva pattern dead-drifted near the bottom is a reasonable tactic in waters that are rich in saddle-case caddis.
Pupation occurs in the same water that the larvae lived in. During a hatch, dead-drift a pupa pattern near the bottom using trout indicator or tight line tactics; present the fly in riffly water or just below riffles. An unweighted pupa pattern can also be drifted near the surface, or you can present a Soft Hackle with a wet-fly swing.Another good strategy is a dry fly with a pupa pattern as a dropper or trailer; the dry fly acts as an indicator and sometimes is taken by the trout.
After the hatch, errant and unlucky adults fall onto the water, and a dry fly is the right choice. Bankwater downwind or downstream from overhanging trees is a good place to cast your dry.
Females swim or crawl underwater to lay eggs. You can fish a dry at this time, or go subsurface with a Soft Hackle or Diving Caddis pattern.
Articles About Saddle-case Caddis
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Saddle-Case Caddis Despite its abundance, the saddle-case caddis (genus Glossosoma) is often slighted by anglers. The most important stage to imitate may be the one most Western anglers fail to recognize. by Jeff Morgan
Hidden Adults Some adult insects dive or crawl underwater to lay their eggs. What's the best way to imitate this behavior? by Jeff Morgan
Caddis Larvae--Part I Imitations of caddis adults and pupae are staples of a well-stocked Western fly box, but larva imitations are generaly absent. And the rare angler that carries larva patterns usually has the wrong ones. by Jeff Morgan
Matching Saddle-case Caddis
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