This beautifully colored black and blue damselfly has a green tint on underside of thorax. The female is duller than the male and has more black markings on the abdomen. The length of the body varies from 1.1 to 1.3 inches. The wings are held a bit apart at rest like the spreadwings.
This species ranges throughout Canada and northern United States, including the mountains in the west. It may be the most northerly distributed and the most common damselfly to be found in the north. It usually can be found at a variety of non-moving waters including marshes, ponds, bogs, and sloughs. In Wisconsin, it is a fairly common, early-season damselfly throughout much of the state.
Early June to mid-August in Wisconsin.