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Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

Dorsal view of a Glossosoma (Glossosomatidae) (Little Brown Short-horned Sedge) Caddisfly Larva from the Yakima River in Washington
I caught this tiny larva without a case, but it seems to key pretty clearly to to Glossosomatidae. From there, the lack of sclerites on the mesonotum points to either Glossosoma or Anagapetus. Although it's difficult to see in a 2D image from the microscope, it's pretty clear in the live 3D view that the pronotum is only excised about 1/3 of its length to accommodate the forecoxa, not 2/3, which points to Glossosoma at Couplet 5 of the Key to Genera of Glossosomatidae Larvae.
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
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Report at a Glance

General RegionCentral PA
Specific LocationBruce's Swimming Hole
Dates Fished4-10
Time of Daynoon to dark
Fish CaughtBrowns
Conditions & Hatchesgrannoms and olives; chilly and cloudy.

Details and Discussion

Martinlf's profile picture
Palmyra PA

Posts: 3047
Martinlf on Apr 10, 2016April 10th, 2016, 7:24 pm EDT
The fish are looking up. Not taking the olives, they liked the grannoms.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Posts: 287
Feathers5 on Apr 11, 2016April 11th, 2016, 6:10 am EDT
Stay out of my fishing hole! Thanks for the post.
Martinlf's profile picture
Palmyra PA

Posts: 3047
Martinlf on Apr 11, 2016April 11th, 2016, 8:51 am EDT
Bruce this week should be hot. Go get em.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell

Posts: 2
Cardealer12 on Apr 12, 2016April 12th, 2016, 10:58 am EDT
Good Luck!
Oldredbarn's profile picture
Novi, MI

Posts: 2600
Oldredbarn on Apr 12, 2016April 12th, 2016, 1:41 pm EDT
Louis...Don't go getting Bruce too revved up now! He might hurt himself. ;)

"Even when my best efforts fail it's a satisfying challenge, and that, after all, is the essence of fly fishing." -Chauncy Lively

"Envy not the man who lives beside the river, but the man the river flows through." Joseph T Heywood
Gutcutter's profile picture

Posts: 470
Gutcutter on Apr 15, 2016April 15th, 2016, 12:25 pm EDT
Grannoms not hatching at Little J. So stay away.
I repeat do not fish the Little J.
If you hear otherwise immediately punch the person in the throat, go home and sleep.
All men who fish may in turn be divided into two parts: those who fish for trout and those who don't. Trout fishermen are a race apart: they are a dedicated crew- indolent, improvident, and quietly mad.

-Robert Traver, Trout Madness

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