These underwater creatures elude most predators by growing during the winter months when most fish are more sluggish. They live only in good quality streams so searching for them tells us about problems in the river and its streams.  HRWC does stonefly searches to gauge the health of our streams. When you sign up to […]

Join your Friends to look for stoneflies! Stoneflies are a primitive group of insects named for their habitat of crawling on stones in a river. Most stoneflies have high oxygen needs, restricting them to clean well-oxygenated streams. Because of this, they are good indicators of stream quality. Some stoneflies hatch in winter, which is why […]