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 was identified by Dave Ruiter as Hydropsyche californica or Hydropsyche occidentalis, but the characteristics were not clear enough to tell them apart.
This caddisfly was collected from the Henry's Fork of the Snake River in Idaho on August 11th, 2018 and added to Troutnut.com by Troutnut on June 12th, 2019.