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.

The Clark's Fork of the Yellowstone River in Wyoming

Stream photos

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Pycnopsyche guttifera (Great Autumn Brown Sedge) Caddisfly Larva Pycnopsyche guttifera (Great Autumn Brown Sedge) Caddisfly Larva

Dorsal view of a Pycnopsyche guttifera (Limnephilidae) (Great Autumn Brown Sedge) Caddisfly Larva from the Yakima River in Washington

This specimen appears to be of the same species as this one collected in the same spot two months earlier. The identification of both is tentative. This one suffered some physical damage before being photographed, too, so the colors aren't totally natural. I was mostly photographing it to test out some new camera setting idea, which worked really well for a couple of closeups.

10 Recently Added Photos

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.

Caddisfly Species Nectopsyche albida (White Millers)

This is the most prominent species of Nectopsyche in most northern states nationwide, and it earned the common name "White Miller" for the genus.

Because Nectopsyche albida is nocturnal, is a favorite of late-season night fishermen.

Where & when

Time of year : Late July to mid-August in the Upper Midwest

In 64 records from GBIF, adults of this species have mostly been collected during June (41%), July (17%), August (17%), May (11%), and September (6%).

In 15 records from GBIF, this species has been collected at elevations ranging from 466 to 4606 ft, with an average (median) of 1112 ft.

Species Range

source

Map of specific collection sites

Hatching behavior

Time of day : Dusk or night

Egg-Laying behavior

Time of day: Dusk or night

Discussions of Nectopsyche albida

Moved from genus level to N. albida

Posted by Entoman on Jun 15, 2014

Last reply on Jun 15, 2014 by Entoman

It is my understanding that wing maculation is quite distinctive and consistent in this genus thus allowing species identification using this character. This specimen has been at the genus level for many years and somehow slipped through the cracks.;)

White Miller Bug

3 replies

Posted by MIKE54 on May 3, 2013

Last reply on May 4, 2013 by Adirman

Where did the name "White Miller" come from, for the caddis bug in the warm Yellowstone waters? I am not interested in the east coast mayfly with the same name. Thanks, Mike Miller.

Start a Discussion of Nectopsyche albida

References

LaFontaine, Gary. 1981. Caddisflies. The Lyons Press.