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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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This discussion is about the Delaware River.

Several anglers fish the tail of a famous pool, loomed over by a Catskill mountain.

From the Delaware River, Junction Pool in New York
The Delaware River, Junction Pool in New York
Late-summer wildflowers bloom along a large trout river.

From the Delaware River, Junction Pool in New York
The Delaware River, Junction Pool in New York
Jesse's profile picture
Posts: 378
Jesse on Jun 29, 2011June 29th, 2011, 7:33 pm EDT
Any suggestions as to what might be effective on the Delaware right now?
Most of us fish our whole lives..not knowing its not the fish that we are after.
Site Editor
"Bear Swamp," PA

Posts: 1681
GONZO on Jun 29, 2011June 29th, 2011, 8:06 pm EDT
Here's a start, Jesse:

Slate Drakes (Isonychia bicolor)
Little Sulphurs/PEDs (Ephemerella d. dorothea)
Summer Blue Quills (Paraleptophlebia spp.)
Light Cahills/Salmon Spinners (Maccaffertium and Stenacron spp.)
Yellow Quills/Pink Ladies (Epeorus vitreus)
Little Yellow Quills (Leucrocuta spp.)
Golden Drakes (Anthopotamus spp.)
Little BWOs (baetids)
Golden Stones (Acroneuria and Paragnetina spp.)
Spotted Sedges (Hydropsyche spp.)
Little Sister Sedges (Cheumatopsyche spp.)
Long-Horned Sedges (leptocerids)

...or you could just throw streamers.
JOHNW's profile picture
Chambersburg, PA

Posts: 452
JOHNW on Jun 30, 2011June 30th, 2011, 6:19 pm EDT
What Gonzo said but if you hit high water and have a boat bang the banks with streamers and hold on! I'm always partial to white streamers in lower light for big browns and the Delaware is full of those. If you dont have a boat then it is difficult to cover enough water to reall make the streamers pay.
The Delaware also has potential for almost blanket Isonychia (aka slate drake, white gloved howdy) hatches probably the most intense late summer iso emergence I ever encountered happened on the Mainstem.
"old habits are hard to kill once you have gray in your beard" -Old Red Barn

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