Male Strophopteryx fasciata (Mottled Willowfly) Stonefly Adult Pictures

Strophopteryx fasciata is the second fly on my hatch chart; the first being Taeniopteryx navalis. Dreadful sounding names to be sure, conjuring up images of prehistoric monsters, but first seeing these benign little creatures bring me much happiness for the dawn of the fly fishing season has begun.

Schweibert discusses S. fascita on p. 64 in "Nymphs"

Often I see them in early March on snow banks and wonder how they can adapt to that. I fish my nymph ties on the bottom of fast riffles just before deep quiet pools, and have more success that way than with drys until about early May. At that time I sometimes have success fishing drys at the mouths of small feeder streams leading into the river.

Dick