MiltRPowell on Mar 21, 2015March 21st, 2015, 5:16 pm EDT
Hello, I'm guessing, your photo's, I myself cannot see it good & it small. Early swimming nymph, crawler, guess, swimming Ephemerella.,subvaria. Go to this site & look at the hatchs. You have it fresh in your head, you'll find it. Try what I thought it could be.
Then take it from there., put the work in you'll find it. Or maybe one of the guy's later will help ya. This early, ah!!, look at Troutnuts nice work him & others have posted. That is part fishing on the fly
finding, looking, & scraching the top of your head,huh!!!!
good luck, later Milt.
Millcreek on Mar 21, 2015March 21st, 2015, 7:38 pm EDT
From the top your first picture is a stonefly, probably a Taeniopterygidae. Your second picture no idea what it could be, the third is a mayfly of some sort, the fourth and fifth are two different caddisflies, and the sixth is a repeat of the second.
"If we knew what it was we were doing, it would not be called research, would it?"