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.
You wonder sometimes how certain insects get their common names. This one is called the 'mahogany dun' for some unknown reason.
This mayfly was collected from the Touchet River in Washington on October 5th, 2011 and added to Troutnut.com by Bnewell on October 6th, 2011.