Ebony jewelwing (Calopteryx maculata) is a large, showy, broad-winged damselfly. It can be found from late May to early September near shallow, small to medium-sized, canopy covered forest streams and adjacent shaded areas. Adults live on average for 16 to 20 days. They are often noticed in large numbers but for only a short period and then sporadically or not at all until the next year.
Jewelwings in Minnesota are identified by the broad, partially or wholly black wings; and on the female the small white patch near the tip of each wing. This species is identified by the brilliant metallic green or blue body; the broader, wholly black wings that are 3 times as long as wide; and the wider white patch near the wing tip of the female.