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.

View from Upper to Lower Titcomb Lake

From Titcomb Basin in Wyoming

Stream photos

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Limnephilidae (Giant Sedges) Caddisfly Larva Limnephilidae (Giant Sedges) Caddisfly Larva

Dorsal view of a Limnephilidae (Giant Sedges) Caddisfly Larva from the Yakima River in Washington

This specimen resembled several others of around the same size and perhaps the same species, which were pretty common in my February sample from the upper Yakima. Unfortunately, I misplaced the specimen before I could get it under a microscope for a definitive ID.

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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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What kind of aquatic bug is this?

Ihunta
Virginia

Posts: 2

Ihunta on Feb 17, 2018February 17th, 2018, 9:53 am EST

Found this in SW VA stream that's cold and clean. It was under cobbles in a lotic erosional zone, and had gills on 4 or 5 of its abdominal segments.

Millcreek
Healdsburg, CA

Posts: 344

Millcreek on Feb 17, 2018February 17th, 2018, 12:21 pm EST

It's a burrowing mayfly, probably either a member of the family Ephemeridae or Potamanthidae.

https://bugguide.net/node/view/614206

https://bugguide.net/node/view/182024/bgimage

"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein

Ihunta
Virginia

Posts: 2

Ihunta on Feb 17, 2018February 17th, 2018, 12:39 pm EST

Ohh, that makes sense with the 3 cerci and the "horns". The multiple tarsal claws and overall size tripped me up, but I'm glad I found one before the lab practical exam!