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.
I found this spinner and a few of his friends bobbing above the river amidst a snowstorm hatch of white Ephoron flies.
This mayfly was collected from the Namekagon River in Wisconsin on August 15th, 2004 and added to Troutnut.com by Troutnut on January 25th, 2006.