In collaboration with the Illinois Department of Natural Resources (IDNR), Dr. Paul Tinerella has completed a 2-sided (24" X 36") color poster of Illinois aquatic macroinvertebrates. The poster represents general aquatic macroinvertebrate species in Illinois and is part of the ongoing IDNR Poster Series. The poster boasts color images of common, but generally unseen Illinois aquatic macroinvertebrates. Christine Fleener and Evan Glynn of the -WBSL- lab provided field assistance in collecting and preparing a number of animals for the poster. Additional contributions were made by INHS scientists Kevin Cummings, Dr. Mike Jeffords, Dr. Chris Taylor, Dr. Steve Taylor, and Mark Wetzel, who contributed additional color images and text for macroinvertebrates within their specialty areas. External contributors included Dr. Jochen Gerber and Dr. William Roston. Special thanks are extended to Valerie Keener, IDNR, for arrangement, logistics, and extensive efforts in seeing the poster to publication.