The medium-sized, dark brown striped emeralds have some pale markings on the thorax and abdomen, black legs, clear wings and brilliant green eyes. The thorax has a metallic bronze-green sheen and the abdomen is dark metallic black-green. Most species are uncommonly seen, but this may be largely due to their secretive nature. When flying, most species look alike which is why in-hand identifications of their anatomical features are often needed.
Varying from 1.9 to 2.2 inches in length, this dark emerald has no distinctive pale markings like other emeralds. It has an obscure anterior lateral thoracic stripe and possible tiny spots on base of segements of the abdomen. Kennedy's emerald is more robust than the delicate emerald. forcipate emerald and incurvate emerald have more pale markings.
This species is commonly found throughout Canada and northeastern United States. It prefers boreal swamps, shaded bog ponds, shallow bogs, and slow open streams in bogs or marshes. In Wisconsin, it is fairly widespread throughout the northern two-thirds of the state, though it is rarely abundant.
Late May to late August in Wisconsin.