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Ecosystem Benefits of Net-Spinning Caddisflies

If you’ve done a leaf pack experiment, you know that caddisflies, along with mayflies and stoneflies, are sometimes referred to as the “canaries of the stream” because they are so sensitive to pollution. The presence of these macroinvertebrates generally indicates good water quality.

Net-spinning caddisflies build nets to trap their food. But did you know that these nets also hold rocks together in streams?

Learn about the ecosystem benefits of net-spinning caddisflies, as well as how they interact with their environment, in this video from Stroud Water Research Center. Caddisflies are abundant in White Clay Creek, the Exceptional Value Stream that runs behind the Stroud Center.