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 specimen appears to be of the same species as this one collected in the same spot two months earlier. The identification of both is tentative. This one suffered some physical damage before being photographed, too, so the colors aren't totally natural. I was mostly photographing it to test out some new camera setting idea, which worked really well for a couple of closeups.
Petiole: A petiole is a stalk, like the one attaching a leaf to the plant stem, and organs extended on a stalk are said to be petiolate. This term is also used to describe forks in wing veins that appear at the end of a single vein (like a letter Y) instead of splitting immediately (like a V).
This other word references the same concept: petiolate.