Article by John SankeyKey to Adult Damselflies of the Ottawa District
Trail & Landscape 2000; 34(1): 17-27
Available on the Biodiversity Heritage Library website

This 10-page article includes diagrams of damselfly body and wing anatomy and many detailed drawings of the features that allow one to distinguish among local species. Adapted from larger keys, especially The Odonata of Canada, and with illustrations prepared for Manuel d’identification des libellules du Québec.