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.
This is a widely distributed species in western Montana but never abundant. Note the length of the middle tail, a key to the identification of this genus.
This mayfly was collected from Many streams in Montana on July 5th, 2007 and added to Troutnut.com by Bnewell on June 26th, 2011.