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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Limnephilus (Summer Flier Sedge) Caddisfly Larva Limnephilus (Summer Flier Sedge) Caddisfly Larva

Case view of a Limnephilus (Limnephilidae) (Summer Flier Sedge) Caddisfly Larva from the Yakima River in Washington

This seems to be a young larva of Limnephilus. Although not clear in the picture, several ventral abdominal segments have chloride epithelia.

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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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Tying the Flav

Female Drunella flavilinea (Flav) Mayfly Dun

6 Pictures

Lateral view of a Female Drunella flavilinea (Ephemerellidae) (Flav) Mayfly Dun from the Henry's Fork of the Snake River in Idaho

I can't be certain of the ID of this female dun, but I'm calling it Drunella flavilinea for three reasons: 1) the known abundance of "flavs" on the Henry's Fork, 2) clear differences in coloration from my confirmed specimens of Drunella coloradensis, which is the main lookalike, and 3) the habitat (a sizable river in a wide mountain valley, rather than a small, high-altitude stream) suggests it's not coloradensis.

Collected July 30, 2020 from the Henry's Fork of the Snake River in Idaho

Added by Troutnut on August 16, 2020

Collected July 30, 2020 from the Henry's Fork of the Snake River in Idaho and added by Troutnut on August 16, 2020

Roguerat

Posts: 456

Roguerat on Mar 11, 2021March 11th, 2021, 7:51 am EST

Lowell,

Welcome to a great forum, and I pm'd you on some Flav resources. Not a familiar fly (local to MI, anyway) so far as I know...

Roguerat

'Less is more...'

Ludwig Mies Vande Rohe

Blue-winged OlivesBaetis

Troutnut Forum › Specimen Discussion › Tying the Flav