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.
Note the unusual red coloration of these Rhithrogena nymphs.
This mayfly was collected from Rock Creek in Montana on July 17th, 2008 and added to Troutnut.com by Bnewell on June 26th, 2011.