In conjunction with the Department of Energy and Environmental Protection (DEEP), volunteers across Connecticut are monitoring wadeable streams for invertebrates that are key indicators of water quality.  I prepared this supplement to DEEP materials for one of the volunteer groups - the Salmon River Watershed Partnership - in order to improve accuracy of identifications.  Other volunteer groups have adopted it as well.  Even if you're not part of the statewide monitoring effort, you may find the guide useful - but be aware that it is far from a complete guide to freshwater invertebrates.  Rather, it focuses on those groups most susceptible to pollution or other habitat degradation.  (Permission has been granted for me to use all images in the guide, however, they may not be reproduced for other purposes without contacting the copyright holders.)

Click the image below to download the guide in PDF format.