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.
Oldredbarn on Feb 3, 2010February 3rd, 2010, 9:22 am EST
Taeniopteryx nivalis....Just a guess here...An Early Black Stone?
I've already hedged my bet due to in only being 2/3...But I'm not sure just how old the photo is...My second guess: Allocapnia granulata...These may be out and about now...Tiny Black Stone...I was just looking at a penny and trying to gauge the hook size...I may stick with my first guess...Just call me wishy-washy!
"Even when my best efforts fail it's a satisfying challenge, and that, after all, is the essence of fly fishing." -Chauncy Lively
"Envy not the man who lives beside the river, but the man the river flows through." Joseph T Heywood
Falsifly on Feb 3, 2010February 3rd, 2010, 10:07 am EST
What have I got to lose, I haven’t hit one yet. I would say from the Family Capniidae but the tails should be visible. That leaves me thinking Leuctridae. Those wings do appear rolled but I understand how deceptive photos can be.
When asked what I just caught that monster on I showed him. He put on his magnifiers and said, "I can't believe they can see that."
Entoman on Mar 23, 2012March 23rd, 2012, 10:09 pm EDT
Al - An easy way to often tell leuctrids (needleflies) at a glance is that their wings are usually pretty close to abdomen width at mid-wing when fully folded (enveloped is a better word). They're also much slenderer critters than the willowflies. http://bugguide.net/node/view/442464
Spence - You were closer with your first guess, though Taeniopteryx nivalis (Boreal Willowfly aka February Red) is in a different subfamily. It is also a much larger insect and usually more brownish as the common name implies. The nymphs can be 3/4" body length.
As for you other guess, the easiest way to tell capniids (snowflies) from other little dark Winter stones (besides usually being the tiniest) are the long tails jutting out from under their wings. The others are vestigial. http://eol.org/pages/613448/overview
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman