Macroinvertebrates—known outside of scientific circles as bugs, worms, mollusks and other small, spineless creatures—are useful when it comes to studying water quality and environmental conditions in and around a stream. For instance, dragonflies, aquatic snails, and flatworms can indicate whether the water in a stream is truly clean. Dr. Lee Pollock, retired Drew University Professor of Biology, has studied these small creatures each year in the Great Swamp watershed since 1992. Join the Great Swamp Watershed Association on Tuesday, May 22, from 8:00 a.m. to 9:30 a.m. to hear findings from his 2011 studies, along with his long-term view of environmental trends and what they mean for our local waters. This talk will take place at Kemmerer Library, 19 Blue Mill Road, Harding Township, NJ. Kemmerer library is in no way responsible for the content or views presented during this event.