Tying caddis doesn’t get any easier than this simple Grannom cased caddis imitation demonstrated by Aaron Jasper in this fly tying video tutorial.
The caddis fly life cycle consists of four stages: egg, larval, pupa and adult. Caddis spend the majority of the life cycle (typically a year) in the larval stage during which caddis form a cocoon-like casing or silk netting to both protect and camouflage themselves from predators – like hungry trout. As a result, the caddis larvae represent a significant year round food source for trout.
Grannom Caddis (Brachycentrus) are present in both Eastern and Western US rivers and prefer riffles and runs with moderate to fast currents, typically attaching their casings to rocks on the stream bottom. Cased larvae, including the Grannom, are prone to behavioral drift (where they periodical let go of their grip on the river bottom and float downstream) and are sometimes knocked loose by the current. As a result, a cased caddis pattern such as this one dead-drifted near the bottom can be highly effective year round.
If you like Aaron’s fly tying videos, check out his recently released European Nymphing Techniques and Fly Tying DVD where he shares with us insight on the highly effective European style of fishing nymphs that is particularly well suited to fishing caddis larvae imitations. The DVD includes several fly tying tutorials on how to tie a number of Aaron’s favorite patterns including his Dronestone and Polish Woven nymphs.
Ken is an avid fisherman of 40+ years who loves to explore and is on a quest to map the best places for fly fishing in America. He created the DIY Fly Fishing App to share this information and help you find new places to fish.
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