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 one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.
Jmd123 on Aug 10, 2020August 10th, 2020, 5:56 am EDT
Looks like genuine timber rattlers to me. Those poor things are just about on the endangered species list! Be happy that you saw them, from a safe distance...they're not common.
Jonathon
No matter how big the one you just caught is, there's always a bigger one out there somewhere...