Walking from my truck into work last week, I noticed a frail looking insect flitting along the surface of the snow on the trail in front of me. On closer inspection, it was a stonefly. Stoneflies are small insects that live most of their lives in streams and rivers, emerging only to complete their reproductive life cycle. Like stone flies, many aquatic insects, including many flies, mosquitos, dragon flies and damselflies have a life cycle that is partly in water and partly above water. But, most of these species emerge and take flight in spring and early summer.