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Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives

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.

Dorsal view of a Limnephilidae (Giant Sedges) Caddisfly Larva from the Yakima River in Washington
This specimen resembled several others of around the same size and perhaps the same species, which were pretty common in my February sample from the upper Yakima. Unfortunately, I misplaced the specimen before I could get it under a microscope for a definitive ID.
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

Specimens of the Stonefly Genus Capnia

1 Adult

Start a Discussion of Capnia


Stonefly Genus Capnia (Little Snowflies)

33 species (Capnia californica, Capnia cheama, Capnia coloradensis, Capnia confusa, Capnia elongata, Capnia erecta, Capnia excavata, Capnia fialai, Capnia giulianii, Capnia glabra, Capnia hitchcocki, Capnia jewetti, Capnia lacustra, Capnia licina, Capnia lineata, Capnia mariposa, Capnia melia, Capnia nearctica, Capnia ophiona, Capnia oregona, Capnia petila, Capnia promota, Capnia quadrituberosa, Capnia regilla, Capnia saratoga, Capnia scobina, Capnia sextuberculata, Capnia spinulosa, Capnia uintahi, Capnia valhalla, Capnia vernalis, Capnia willametta, and Capnia zukeli) aren't included.
Genus Range
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