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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 Family Chloroperlidae (Sallflies)

These stoneflies, the "little yellows" and "little greens," are quite common Summer fauna. They are spread out in a mix between the different genera. The common name for them is Sallfly.

Where & when

In 215 records from GBIF, adults of this family have mostly been collected during June (32%), July (24%), May (20%), August (11%), and April (11%).

In 88 records from GBIF, this family has been collected at elevations ranging from 49 to 11201 ft, with an average (median) of 8579 ft.

Family Range

Hatching behavior

Time of day : Morning

Egg-Laying behavior

Time of day: Afternoon and evening

Specimens of the Stonefly Family Chloroperlidae

1 Male Adult
6 Female Adults
14 Adults
11 Nymphs

2 Streamside Pictures of Chloroperlidae Stoneflies:

Start a Discussion of Chloroperlidae


Stonefly Family Chloroperlidae (Sallflies)

Genus in Chloroperlidae: Alloperla, Kathroperla, Paraperla, Suwallia, Sweltsa
8 genera (Alaskaperla, Bisancora, Haploperla, Plumiperla, Rasvena, Sasquaperla, Triznaka, and Utaperla) aren't included.
Family Range
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