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Specimen Discussion

> caddis larva beh;a;vior question (really!)

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CaseyP	December 18th, 2009, 1:37 pm
Arlington, VA/ Mercersburg, PA Posts: 557	tying for the grannom hatch on the Little Juniata. have a couple of standards, but just can't resist fiddling a bit: do the grannom larvae in their cases hold onto the rocks with little sticky filaments which might be duplicated with a few fibers of CDC, or do they hold on with their legs sticking out which can be duplicated with hackle, or do they not hold on at all?
	"You can observe a lot by watching." Yogi Berra
Tilman	December 18th, 2009, 4:01 pm
Gemany Posts: 38	I´m interested in how you will attempt to imitate this kind of body. Glass beads would do a good job, but are very heavy, if the size is too big. (i have some very small ones, for a size 14-16 nymph hook) I´d like to see a photo of your fly, when you are done.
	"Live and Learn" - Mr. Spock http://www.directupload.net/galerie/154319/LfyCOrbM3j/0
CaseyP	December 18th, 2009, 4:38 pm
Arlington, VA/ Mercersburg, PA Posts: 557	it's not fancy or intricate--peacock Ice Dub for a body, bright green thread, and a black tungsten bead. i've caught fish on size 12 nymph hooks and size 16 wet hooks. i'll post a photo over on the photo place after the holidays. i've tied them in Krienik braid as well, but haven't fished them; one of my gurus said the fuzzy, buggy one would do better. next spring i'll do one of my patented tests: tie one of each on a leader with two tags and see what works best. did that once with shad darts and indeed, that silly one with the plain red cone head out-caught the the others by a mile.
	"You can observe a lot by watching." Yogi Berra
Creno	December 18th, 2009, 8:07 pm
Centennial CO Posts: 125	Brachycentrus larvae usually glue the leading edge of the case to the substrate of choice - rock, wood, another Brachycentrus case,etc. There are some great photos of this, and lots of other neat critters and stuff, on Joe Giersch's site: drunelladesigns.com. check it out! Joe is a great guy who knows an awful lot about alot of aquatic insects. creno
CaseyP	December 19th, 2009, 6:45 am
Arlington, VA/ Mercersburg, PA Posts: 557	gee, thanks, Creno! indeed, pictures are worth so much more than mere words...
	"You can observe a lot by watching." Yogi Berra
Lastchance	December 19th, 2009, 7:27 am
Portage, PA Posts: 219	After looking again at Jason's photos of the grannom caddis, I wonder, don't we tie these pupas too dark? I know the emergers are tied with dark bodies imitated with peacock herl, etc. Bruce
LittleJ	December 19th, 2009, 1:25 pm
Hollidaysburg Pa Posts: 252	Bruce, I believe when they emerge from the case they are a darker color. However, a Tapered pheasant tail case w/ a light green sparkle yarn "larva" works great in the days leading up to this hatch. jeff
CaseyP	December 19th, 2009, 5:09 pm
Arlington, VA/ Mercersburg, PA Posts: 557	I know the emergers are tied with dark bodies imitated with peacock herl, etc.--Bruce well, silly me! all along i thought the peacock/furnace fly was imitating the cased larva come adrift in the process of pupating. hence my addition of bright green thread.
	"You can observe a lot by watching." Yogi Berra
Lastchance	December 20th, 2009, 7:01 am
Portage, PA Posts: 219	Hi CaseyP: I may be wrong about that, but when I was learning to fly fish about 25 years ago that's what I was told. I fished a similar wet fly we called "Bait" because during the caddis hatch it caught so many fish on the deadrift and the swing. It was actually brown hackle and peacock. Merry Christmas, Bruce
CaseyP	December 20th, 2009, 12:11 pm
Arlington, VA/ Mercersburg, PA Posts: 557	Bruce, you must be right: the adults are black with tan speckled wings. the pupa we see in Jason's photos was still inside the case. it stands to reason that the pupa would be darker when it was ready to hatch into an adult. (but what has reason to do with any of this?) if we just let the trout tell us what color things ought to be, we'd save a lot of speculation, and it seems to me you've done that. thanks for sharing! back to the tying table...;-)
	"You can observe a lot by watching." Yogi Berra
LittleJ	December 20th, 2009, 1:51 pm
Hollidaysburg Pa Posts: 252	a peacock wet with a green tag works very well. The females are divers and the egg sac is about the color of the larva.

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