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Billj has attached this picture to aid in identification. The message is below.
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odd cased insects? found in all brook trout stomachs at ice out. water temp 35 F no emergers yet seen.
odd cased insects? found in all brook trout stomachs at ice out. water temp 35 F no emergers yet seen.
BilljApril 23rd, 2011, 9:28 am
sunderland, vermont

Posts: 4
hello, I am stumped and the fish biologists here are shrugging and throwing out guesses as to what I have here.

most think its a diptera with the legs already dissolved but I disagree, its a hard casement and all of the ice out brook trout are full of them in the ponds here in S. VT.

what the heck are they?

half an inch in length to almost an inch, I will try to dissect one open this week if I catch more with them in it.

any help, would be thankfully accepted!

TaxonApril 23rd, 2011, 10:30 am
Site Editor
Plano, TX

Posts: 1320

That is an aquatic soldier fly larva, family Stratiomyidae, probably genus Stratiomys. Please see this photo by Tom Murray.
Best regards,
Roger Rohrbeck
BilljApril 23rd, 2011, 9:58 pm
sunderland, vermont

Posts: 4
Fantastic! Thanks for the fast and accurate reply, these were new to me and I knew they weren't something with partially digested legs missing.

I'm very glad I found this site, great folks and very knowledgeable and helpful!
TaxonApril 23rd, 2011, 10:36 pm
Site Editor
Plano, TX

Posts: 1320

Your are welcome; my pleasure.
Best regards,
Roger Rohrbeck
PaulRobertsApril 25th, 2011, 8:05 am

Posts: 1776
Thanks for posting it Billj. Gives us all a better bead on ice-out trout activity.

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