One nice little green morsel tumbling down the riffles, the non-case building (caseless), succulent tidbit… the Green Rockworm Caddis Larva. This is a simple pattern to tie and is fished along the bottom through those riffles and runs where a GRWC would be drifting along. A good summer time pattern that is effective into September. The larva images demonstrate the simplicity of the larva and the use of various materials can be used to show the segmented abdomen and slightly darker thorax area. Check Out Trout Nut and Westfly for habitat info and pattern suggestions.
SwittersB & Exploring 
One of my favorite caddis larva imitations is a latex caddis, but until recently, it was only suitable for me to tie them in cream and tan (using white latex) and then color them with a marker to suit the local hatch. Unfortunately I wasn’t pleased with any marker’s ability to match the bright vibrant green of the Rhyacophila. Recently I started using Nymph Stretch Skin in…what else…caddis green, and it’s right on. Color, segmentation, everything. Just lead, NSS, and some spikey dubbing. Simple and effective.
http://farm5.static.flickr.com/4020/4699774038_67f630a959.jpg (Pic of latex rockworm)
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I’ve been stopping by here for quite some time on a regular basis but this is the first pattern suggestion I’ve felt the need to comment on. An old timer that got me started had a very similar pattern he let me borrow which he just referred to as “this puffy green thingy”. Had a very good day with it, but at the time I was not tying my own. Thanks for reminding me of it. I’m in the box right now looking for material.
http://myflyfishinglessons.com
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Godfrey…you are exactly spot on and thank you for commenting. I actually posted this for much the same reason. I keep forgetting to tie an effective and simple pattern. Also, I am not overly impressed with my previous efforts…effective but could be better. I appreciate your comments.
GM/SB
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