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.
This very small, early instar specimen has some interesting markings, but it's too underdeveloped to identify.
This mayfly was collected from unknown in Wisconsin on January 14th, 2004 and added to Troutnut.com by Troutnut on January 25th, 2006.