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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.

Updates from June 25, 2008

Closeup insects by Bnewell from Yellow Bay Creek and Denali National Park in Montana and Alaska

Ironodes nitidus (Slate Maroon Drake) Mayfly Adult
While relatively rare in most of western Montana, it is common in several small streams along the east side of Flathead Lake and streams on the south side of the Flathead Indian Reservation.
Limnephilus externus (Summer Flier Sedge) Caddisfly Larva
This caddis is one of the most abundant caddisflies in temporary ponds of Glacier Park. The larvae build a round case of detritus and dead plant material that can get quite large.
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