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 is the first of it's family I've seen, collected from a tiny, fishless stream in the Cascades. The three species of this genus all live in the Northwest and are predators that primarily eat stonefly nymphs Merritt R.W., Cummins, K.W., and Berg, M.B. (2019).
Continuing my sightseeing tour of remote Idaho, I drove around a bunch of backroads and made a quick fishing stop at enticing-looking water on the Yankee Fork of the Salmon. I didn't even put waders on, just wandered out on a gravel bar in street shoes to take a few casts, aiming to keep my "at least one trout every day of the trip" streak alive on a day without any real fishing. The fishing wasn't good, but a 7-inch bull trout (quickly released unharmed) kept the streak alive.