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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
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.

Lateral view of a Clostoeca disjuncta (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington
This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.
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.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Updates from March 23, 2004

Updates from March 23, 2004

Underwater photos by Troutnut

This Ephemerella subvaria (Hendrickson) nymph picture is one of my favorites.
The white blotches on this rock are Leucotrichia caddisfly cases, and the wispy tubes are cases made by a type of midge.
This log houses several Ephemerella mayfly nymphs and, on the top right, an Epeorus mayfly nymph.
A water boatman flees the camera.
There are several species of caddisfly larvae and Ephemerella nymphs on this rock.
A careful look at this picture reveals at least three water boatmen swimming around.
A big crayfish lurks under a log.
Two Ephemerella mayfly nymphs share a piece of wood with two Taeniopterygidae stonefly nymphs.

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