Winter Stonefly Search

Unlike most aquatic insects that thrive in summer, winter stoneflies spend their immature stages growing beneath the ice, emerging as adults in late winter. Their preference for cold, highly oxygenated water makes them exceptional bioindicators: they can only survive in streams with excellent water quality and low pollution levels. By searching for these elusive creatures when most fish predators are sluggish, volunteers help the Huron River Watershed Council (HRWC) gather vital data on the health of rivers and streams across Livingston, Oakland, and Washtenaw Counties. With over 30 years of monitoring history, this project transforms a winter outing into a powerful act of science that directly informs local conservation efforts.

When you join the Winter Stonefly Search, you become part of a small, hands-on team working alongside experienced researchers. Together, you will wade into selected stretches of stream, collect stoneflies from the riverbed, and learn how the presence (or absence) of these insects reveals the biological health of the waterway. Children are warmly welcomed with adult supervision, and HRWC is committed to accessibility—many study sites can accommodate volunteers who use mobility devices, weather permitting. Whether you are a seasoned naturalist or a curious beginner, this project offers a memorable way to contribute to three decades of ongoing science while experiencing the hidden vibrancy of winter rivers.