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.
GONZO on Oct 28, 2008October 28th, 2008, 6:50 am EDT
This looks like Paragnetina to me, and the genital hooks (as best I can make out) seem to fit that ID. My resources for identifying adult Perlidae are pretty thin, so I welcome comments from others. (#707 looks like it might be another.)