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.

Stream photos

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Tricorythodes (Trico) Mayfly Nymph Tricorythodes (Trico) Mayfly Nymph

Dorsal view of a Tricorythodes (Leptohyphidae) (Trico) Mayfly Nymph from Mystery Creek #308 in Washington

9 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.

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Stonefly Genus Capnia (Little Snowflies)

This is one of the most common genera of Capniidae.

Where & when

In 47 records from GBIF, adults of this genus have mostly been collected during April (34%), March (21%), May (15%), February (13%), and June (11%).

In 8 records from GBIF, this genus has been collected at elevations ranging from 220 to 8648 ft, with an average (median) of 5338 ft.

Genus Range

source

Map of specific collection sites

Specimens of the Stonefly Genus Capnia

1 Adult

Capnia nana (Little Snowfly) Stonefly Adult

2 Pictures

Capnia nana (Capniidae) (Little Snowfly) Stonefly Adult from the N. Fork Touchet River in Washington

Collected March 6, 2012 from the N. Fork Touchet River in Washington

Added by Bnewell on March 20, 2012

Collected March 6, 2012 from the N. Fork Touchet River in Washington and added by Bnewell on March 20, 2012

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References

Schwiebert, Ernest G. 1955. Matching the Hatch. MacMillan Publishing Company.