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.

Upper Titcomb Lake

From Titcomb Basin in Wyoming

Stream photos

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Perlodidae (Springflies and Yellow Stones) Stonefly Nymph Perlodidae (Springflies and Yellow Stones) Stonefly Nymph

Artistic view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington

This one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.

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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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Caddisfly Species Agraylea multipunctata (Salt and Pepper Microcaddisflies)

Where & when

Time of year : June and July

Preferred waters: Lakes, spring creeks

In 160 records from GBIF, adults of this species have mostly been collected during August (19%), July (19%), June (18%), May (16%), September (15%), and April (7%).

In 91 records from GBIF, this species has been collected at elevations ranging from 3 to 9009 ft, with an average (median) of 1312 ft.

Species Range

source

Map of specific collection sites

Hatching behavior

Time of day : Overnight or dawn

Gary LaFontaine reports in Caddisflies that the emergence of this species occurs overnight but there may be a fishable number of cripples left on the water at dawn.

Larva & pupa biology

Substrate: Vegetation

Start a Discussion of Agraylea multipunctata

References

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