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.
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.
This mayfly was collected from Yellow Bay Creek in Montana on June 25th, 2008 and added to Troutnut.com by Bnewell on June 28th, 2011.