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.

A small, old rock wing dam has created an excellent riffle and pool in this classic trout stream.

Stream photos

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Sweltsa (Sallfly) Stonefly Nymph Sweltsa (Sallfly) Stonefly Nymph

Dorsal view of a Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington

This species was fairly abundant in a February sample of the upper Yakima.

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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.

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 Limnephilus submonilifer (Summer Flier Sedges)

Where & when

Preferred waters: Rivers and spring ponds

This species can be extremely abundant, especially in spring ponds. In Caddisflies, Gary LaFontaine described the larvae in some New Hampshire spring ponds as "so plentiful there that they cover the bottom."

In 142 records from GBIF, adults of this species have mostly been collected during June (22%), May (20%), September (20%), October (11%), April (9%), August (6%), and July (6%).

In 89 records from GBIF, this species has been collected at elevations ranging from 20 to 5075 ft, with an average (median) of 778 ft.

Species Range

source

Map of specific collection sites

Larva & pupa biology

Current speed: Still to slow

Start a Discussion of Limnephilus submonilifer

References

LaFontaine, Gary. 1981. Caddisflies. The Lyons Press.
Swisher, Doug and Carl Richards. 2000. Selective Trout. The Lyons Press.