Larvae stage
Found in the shade
On a sunny morning with light wind
Found under a rock
Tail fell off upon capture
Found in my moth trap. Delicate little insect with long "tails" and opaque yet somewhat transparent wings that fold like an accordian. Must be lovely in flight!
In second picture, this individual is on the lower right. Found in moth trap. Probably the smallest I've seen of the Stream Mayflies (assuming I am correct on this category?)