The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
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.