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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.

Heptagenia solitaria (Gray Fox) Mayfly Adult Pictures

This species is common in the Flathead River below Kerr Day. The river here is fairly warm with a cobble and boulder bottom with heavy periphyton at times. This species is not common elsewhere in western Montana.

This mayfly was collected from the Flathead River-lower in Montana on July 4th, 2005 and added to Troutnut.com by Bnewell on June 28th, 2011.

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