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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
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.

Dorsal view of a Holocentropus (Polycentropodidae) Caddisfly Larva from the Yakima River in Washington
This one seems to tentatively key to Holocentropus, although I can't make out the anal spines in Couplet 7 of the Key to Genera of Polycentropodidae Larvae nor the dark bands in Couplet 4 of the Key to Genera of Polycentropodidae Larvae, making me wonder if I went wrong somewhere in keying it out. I don't see where that could have happened, though. It might also be that it's a very immature larva and doesn't possess all the identifying characteristics in the key yet. If Holocentropus is correct, then Holocentropus flavus and Holocentropus interruptus are the two likely possibilities based on range, but I was not able to find a description of their larvae.
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 Rhyacophila pellisa (Green Sedges)

Gary LaFontaine in Caddisflies reports finding both pupae and adults of this species frequently in his stomach pump samples.

Where & when

Time of year : Summer

In 46 records from GBIF, adults of this species have mostly been collected during August (39%), July (30%), June (17%), and May (9%).

In 34 records from GBIF, this species has been collected at elevations ranging from 1300 to 10741 ft, with an average (median) of 8681 ft.

Species Range

Hatching behavior

Time of day : Morning

Egg-Laying behavior

Time of day: Morning


Start a Discussion of Rhyacophila pellisa

References

  • LaFontaine, Gary. 1981. Caddisflies. The Lyons Press.

Caddisfly Species Rhyacophila pellisa (Green Sedges)

Taxonomy
Species Range
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