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

Blue-winged Olives
Baetis

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.

Cedar sweepers line the fertile spring creek headwaters of a famous trout stream.

From the Bois Brule River in Wisconsin

Stream photos

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Isoperla (Stripetails and Yellow Stones) Stonefly Adult Isoperla (Stripetails and Yellow Stones) Stonefly Adult

Dorsal view of a Isoperla (Perlodidae) (Stripetails and Yellow Stones) Stonefly Adult from Mystery Creek #308 in Washington

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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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Schroon River Stone Fly

Cstiles has attached this picture to aid in identification. The message is below.

Cstiles
Posts: 2

Cstiles on Jun 13, 2010June 13th, 2010, 1:28 am EDT

I have seen several of these nymphs over the years but Not sure what they are or what the adult looks like. Any help would be appreciated.

Chris

GONZO
Site Editor
"Bear Swamp," PA

Posts: 1681

GONZO on Jun 13, 2010June 13th, 2010, 4:33 am EDT

Chris,

Your stonefly nymph looks like Paragnetina media. This is one of the most common large perlids in much of the East and Midwest. The adults are dark-winged with yellowish bellies. They look like this: http://bugguide.net/node/view/404851/bgimage

Cstiles
Posts: 2

Cstiles on Jun 13, 2010June 13th, 2010, 8:56 am EDT

Gonzo,
Thanks for the ID. The Schroon is so loaded with different types of stone flies, It's hard to keep track of all of them. The big goldens (Acroneuria carolinensis) are predominate. I estimate that 80% of the trout bug volume is made up of caddis and stones. Mayflies and ants making up the final 20%.
Thanks again,
Chris