Sometimes the creatures that inhabit lakes and streams indicate whether the water is of poor or good quality. Here Michigan State University outreach specialists Lois Wolfson and Howard Wandell explain how to search for these important indicators of the health of a body of water. Worksheets below the video help with identification.
Download the badbugs key to identify macroinvertebrates that thrive in polluted water.
Down load the goodbugs key to identify macroinvertebrates that like high water quality.
This sheet identifies groups of macroinvertebrates.