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.

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Holocentropus Caddisfly Larva Holocentropus Caddisfly Larva

Dorsal view of a Holocentropus (Polycentropodidae) Caddisfly Larva from the Yakima River in Washington

This one seems to tentatively key to Holocentropus, although I can't make out the anal spines in Couplet 7 of the Key to Genera of Polycentropodidae Larvae nor the dark bands in Couplet 4 of the Key to Genera of Polycentropodidae Larvae, making me wonder if I went wrong somewhere in keying it out. I don't see where that could have happened, though. It might also be that it's a very immature larva and doesn't possess all the identifying characteristics in the key yet. If Holocentropus is correct, then Holocentropus flavus and Holocentropus interruptus are the two likely possibilities based on range, but I was not able to find a description of their larvae.

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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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AMERICAN RIVER LOOKING EAST

PESCATORE has attached this picture. The message is below.

PESCATORE

Rancho Cordova, CA

Posts: 17

PESCATORE on Jul 3, 2018July 3rd, 2018, 9:38 am EDT

Greetings:

Last week I was working on some Shad in the American River, great practice for Steelhead season, which comes later in the year. I had my waterproof camera in tow so; I decided to shoot up river headed east. The famous Clay Banks can be seen to the right of the frame. I was wading in about four feet of water, 80 feet from the center of the river.

Enjoy,

Don

Don