05/24/2026
Want to see if your local stream is clean? Look at the bugs!
Macroinvertebrates, many of which are insect larvae, are a great indicator of water quality due to their differing pollution tolerance. We had a great time surveying a local stream recently where we found a wide variety of sensitive species, including mayflies, stoneflies, and caddisflies. This abundance of sensitive species tells us that the stream has high water quality, making it good habitat for the pickier species. (Fun fact: some species of caddisflies make protective cases using gravel, twigs, or sand – scroll to the last photo to see some caddisflies in twig armor!)
Interested in completing a macroinvertebrate survey of your own? We can help! LAWPC can lend you a sampling kit, as well as provide training resources and support. Reach out to us at [email protected] for more information.
*A huge thanks to members of Maine Conservation Corps and staff from Androscoggin Land Trust and Maine Audubon for helping out with this event!