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.
Continuing my exploration of some remote parts of central Idaho, I hiked into a little alpine lake called Green Lake above the Copper Basin and caught a 5-inch rainbow. There seems to be a naturally reproducing population of tiny rainbows there (I saw fry), but I saw no sign of big ones. Back at the trailhead, I collected some interesting bugs at the lake outlet.
Then I drove north quite a ways, touring some very remote roads. I collected some bugs from tiny creeks along the way, without stopping to fish.